172893881 has 4 divisors (see below), whose sum is σ = 173027472. Its totient is φ = 172760292.

The previous prime is 172893823. The next prime is 172893883. The reversal of 172893881 is 188398271.

172893881 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 Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 172893881 - 2¹⁸ = 172631737 is a prime.

It is a super-2 number, since 2×172893881² = 59784588174484322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172893883) 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, 64835 + ... + 67448.

It is an arithmetic number, because the mean of its divisors is an integer number (43256868).

Almost surely, 2^172893881 is an apocalyptic number.

It is an amenable number.

172893881 is a deficient number, since it is larger than the sum of its proper divisors (133591).

172893881 is a wasteful number, since it uses less digits than its factorization.

172893881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133590.

The product of its digits is 193536, while the sum is 47.

The square root of 172893881 is about 13148.9117800676. The cubic root of 172893881 is about 557.0915114480.

The spelling of 172893881 in words is "one hundred seventy-two million, eight hundred ninety-three thousand, eight hundred eighty-one".