172929023 has 2 divisors, whose sum is σ = 172929024. Its totient is φ = 172929022.

The previous prime is 172929017. The next prime is 172929041. The reversal of 172929023 is 320929271.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 172929023 - 2²² = 168734719 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172929623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86464511 + 86464512.

It is an arithmetic number, because the mean of its divisors is an integer number (86464512).

Almost surely, 2^172929023 is an apocalyptic number.

172929023 is a deficient number, since it is larger than the sum of its proper divisors (1).

172929023 is an equidigital number, since it uses as much as digits as its factorization.

172929023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 172929023 is about 13150.2480204747. The cubic root of 172929023 is about 557.1292532573.

The spelling of 172929023 in words is "one hundred seventy-two million, nine hundred twenty-nine thousand, twenty-three".