172895257 has 2 divisors, whose sum is σ = 172895258. Its totient is φ = 172895256.

The previous prime is 172895251. The next prime is 172895263. The reversal of 172895257 is 752598271.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (172895251) and next prime (172895263).

It can be written as a sum of positive squares in only one way, i.e., 171505216 + 1390041 = 13096^2 + 1179^2 .

It is an emirp because it is prime and its reverse (752598271) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172895257 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (172895251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86447628 + 86447629.

It is an arithmetic number, because the mean of its divisors is an integer number (86447629).

Almost surely, 2^172895257 is an apocalyptic number.

It is an amenable number.

172895257 is a deficient number, since it is larger than the sum of its proper divisors (1).

172895257 is an equidigital number, since it uses as much as digits as its factorization.

172895257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 352800, while the sum is 46.

The square root of 172895257 is about 13148.9641036851. The cubic root of 172895257 is about 557.0929893409.

The spelling of 172895257 in words is "one hundred seventy-two million, eight hundred ninety-five thousand, two hundred fifty-seven".