172072623 has 12 divisors (see below), whose sum is σ = 243721160. Its totient is φ = 107966592.

The previous prime is 172072619. The next prime is 172072633. The reversal of 172072623 is 326270271.

It is not a de Polignac number, because 172072623 - 2² = 172072619 is a prime.

It is a super-2 number, since 2×172072623² = 59217975172200258, 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 (172072633) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 98368 + ... + 100101.

Almost surely, 2^172072623 is an apocalyptic number.

172072623 is a deficient number, since it is larger than the sum of its proper divisors (71648537).

172072623 is a wasteful number, since it uses less digits than its factorization.

172072623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198506 (or 198489 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 30.

The square root of 172072623 is about 13117.6454823265. The cubic root of 172072623 is about 556.2080365937.

The spelling of 172072623 in words is "one hundred seventy-two million, seventy-two thousand, six hundred twenty-three".