172970623 has 12 divisors (see below), whose sum is σ = 208635600. Its totient is φ = 140455296.

The previous prime is 172970593. The next prime is 172970647. The reversal of 172970623 is 326079271.

It is not a de Polignac number, because 172970623 - 2⁵ = 172970591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172970723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31698 + ... + 36751.

It is an arithmetic number, because the mean of its divisors is an integer number (17386300).

Almost surely, 2^172970623 is an apocalyptic number.

172970623 is a deficient number, since it is larger than the sum of its proper divisors (35664977).

172970623 is an equidigital number, since it uses as much as digits as its factorization.

172970623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68494 (or 68475 counting only the distinct ones).

The product of its (nonzero) digits is 31752, while the sum is 37.

The square root of 172970623 is about 13151.8296445780. The cubic root of 172970623 is about 557.1739242217.

The spelling of 172970623 in words is "one hundred seventy-two million, nine hundred seventy thousand, six hundred twenty-three".