172608239 has 2 divisors, whose sum is σ = 172608240. Its totient is φ = 172608238.

The previous prime is 172608229. The next prime is 172608253. The reversal of 172608239 is 932806271.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 172608239 - 2⁸ = 172607983 is a prime.

It is a super-2 number, since 2×172608239² = 59587208341362242, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172608229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86304119 + 86304120.

It is an arithmetic number, because the mean of its divisors is an integer number (86304120).

Almost surely, 2^172608239 is an apocalyptic number.

172608239 is a deficient number, since it is larger than the sum of its proper divisors (1).

172608239 is an equidigital number, since it uses as much as digits as its factorization.

172608239 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 172608239 is about 13138.0454786852. The cubic root of 172608239 is about 556.7845477264.

The spelling of 172608239 in words is "one hundred seventy-two million, six hundred eight thousand, two hundred thirty-nine".