8172992257 has 8 divisors (see below), whose sum is σ = 8302124160. Its totient is φ = 8044249920.

The previous prime is 8172992249. The next prime is 8172992263. The reversal of 8172992257 is 7522992718.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8172992257 - 2³ = 8172992249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8172992207) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54957 + ... + 139162.

It is an arithmetic number, because the mean of its divisors is an integer number (1037765520).

Almost surely, 2^8172992257 is an apocalyptic number.

It is an amenable number.

8172992257 is a deficient number, since it is larger than the sum of its proper divisors (129131903).

8172992257 is a wasteful number, since it uses less digits than its factorization.

8172992257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194783.

The product of its digits is 1270080, while the sum is 52.

The square root of 8172992257 is about 90404.6030741798. The cubic root of 8172992257 is about 2014.3133411822.

The spelling of 8172992257 in words is "eight billion, one hundred seventy-two million, nine hundred ninety-two thousand, two hundred fifty-seven".