1071681923 has 4 divisors (see below), whose sum is σ = 1154119008. Its totient is φ = 989244840.

The previous prime is 1071681913. The next prime is 1071681929. The reversal of 1071681923 is 3291861701.

1071681923 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 an emirpimes, since its reverse is a distinct semiprime: 3291861701 = 19 ⋅173255879.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1071681923 is a prime.

It is a super-2 number, since 2×1071681923² = 2297004288169955858, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1071681929) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41218523 + ... + 41218548.

It is an arithmetic number, because the mean of its divisors is an integer number (288529752).

Almost surely, 2^1071681923 is an apocalyptic number.

1071681923 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1071681923 is a deficient number, since it is larger than the sum of its proper divisors (82437085).

1071681923 is an equidigital number, since it uses as much as digits as its factorization.

1071681923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82437084.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 1071681923 is about 32736.5533158272. The cubic root of 1071681923 is about 1023.3447559147.

The spelling of 1071681923 in words is "one billion, seventy-one million, six hundred eighty-one thousand, nine hundred twenty-three".