172396631 has 8 divisors (see below), whose sum is σ = 188557200. Its totient is φ = 156317440.

The previous prime is 172396621. The next prime is 172396657. The reversal of 172396631 is 136693271.

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 172396631 - 2²² = 168202327 is a prime.

It is a super-2 number, since 2×172396631² = 59441196760300322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172396621) 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, 15866 + ... + 24423.

It is an arithmetic number, because the mean of its divisors is an integer number (23569650).

Almost surely, 2^172396631 is an apocalyptic number.

172396631 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

172396631 is a deficient number, since it is larger than the sum of its proper divisors (16160569).

172396631 is a wasteful number, since it uses less digits than its factorization.

172396631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40689.

The product of its digits is 40824, while the sum is 38.

The square root of 172396631 is about 13129.9897562793. The cubic root of 172396631 is about 556.5569258296.

The spelling of 172396631 in words is "one hundred seventy-two million, three hundred ninety-six thousand, six hundred thirty-one".