39172889 has 16 divisors (see below), whose sum is σ = 47326080. Its totient is φ = 31674240.

The previous prime is 39172877. The next prime is 39172891. The reversal of 39172889 is 98827193.

It is a cyclic number.

It is not a de Polignac number, because 39172889 - 2²⁰ = 38124313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39172829) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41159 + ... + 42099.

It is an arithmetic number, because the mean of its divisors is an integer number (2957880).

Almost surely, 2^39172889 is an apocalyptic number.

It is an amenable number.

39172889 is a deficient number, since it is larger than the sum of its proper divisors (8153191).

39172889 is a wasteful number, since it uses less digits than its factorization.

39172889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1280.

The product of its digits is 217728, while the sum is 47.

The square root of 39172889 is about 6258.8248897057. The cubic root of 39172889 is about 339.6215194398.

The spelling of 39172889 in words is "thirty-nine million, one hundred seventy-two thousand, eight hundred eighty-nine".