172904457 has 8 divisors (see below), whose sum is σ = 251497440. Its totient is φ = 104790560.

The previous prime is 172904449. The next prime is 172904471. The reversal of 172904457 is 754409271.

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 172904457 - 2³ = 172904449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (172904437) 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, 2619732 + ... + 2619797.

It is an arithmetic number, because the mean of its divisors is an integer number (31437180).

Almost surely, 2^172904457 is an apocalyptic number.

It is an amenable number.

172904457 is a deficient number, since it is larger than the sum of its proper divisors (78592983).

172904457 is a wasteful number, since it uses less digits than its factorization.

172904457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5239543.

The product of its (nonzero) digits is 70560, while the sum is 39.

The square root of 172904457 is about 13149.3139364759. The cubic root of 172904457 is about 557.1028703996.

The spelling of 172904457 in words is "one hundred seventy-two million, nine hundred four thousand, four hundred fifty-seven".