Search a number
192071881 = 138592
BaseRepresentation
bin10110111001011…
…00100011001001
3111101102021002101
423130230203021
5343132300011
631020433401
74521404221
oct1334544311
9441367071
10192071881
11994684a1
12543a8861
1330a3c801
141b71b081
1511ce02c1
hexb72c8c9

192071881 has 3 divisors (see below), whose sum is σ = 192085741. Its totient is φ = 192058022.

The previous prime is 192071857. The next prime is 192071909. The reversal of 192071881 is 188170291.

The square root of 192071881 is 13859.

It is a perfect power (a square), and thus also a powerful number.

192071881 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 188170291 = 238181317.

It is not a de Polignac number, because 192071881 - 213 = 192063689 is a prime.

It is a super-2 number, since 2×1920718812 = 73783214941756322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 192071881.

It is not an unprimeable number, because it can be changed into a prime (192071081) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 6930 + ... + 20788.

Almost surely, 2192071881 is an apocalyptic number.

192071881 is the 13859-th square number.

192071881 is the 6930-th centered octagonal number.

It is an amenable number.

192071881 is a deficient number, since it is larger than the sum of its proper divisors (13860).

192071881 is an frugal number, since it uses more digits than its factorization.

192071881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27718 (or 13859 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 37.

The cubic root of 192071881 is about 576.9718124332.

The spelling of 192071881 in words is "one hundred ninety-two million, seventy-one thousand, eight hundred eighty-one".

Divisors: 1 13859 192071881