172331297 has 2 divisors, whose sum is σ = 172331298. Its totient is φ = 172331296.

The previous prime is 172331287. The next prime is 172331309. The reversal of 172331297 is 792133271.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 113976976 + 58354321 = 10676^2 + 7639^2 .

It is a cyclic number.

It is not a de Polignac number, because 172331297 - 2⁸ = 172331041 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (172331287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86165648 + 86165649.

It is an arithmetic number, because the mean of its divisors is an integer number (86165649).

Almost surely, 2^172331297 is an apocalyptic number.

It is an amenable number.

172331297 is a deficient number, since it is larger than the sum of its proper divisors (1).

172331297 is an equidigital number, since it uses as much as digits as its factorization.

172331297 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15876, while the sum is 35.

The square root of 172331297 is about 13127.5015520852. The cubic root of 172331297 is about 556.4866099067.

The spelling of 172331297 in words is "one hundred seventy-two million, three hundred thirty-one thousand, two hundred ninety-seven".