257672227 has 2 divisors, whose sum is σ = 257672228. Its totient is φ = 257672226.

The previous prime is 257672209. The next prime is 257672231. The reversal of 257672227 is 722276752.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-257672227 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 257672227.

It is not a weakly prime, because it can be changed into another prime (257672287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128836113 + 128836114.

It is an arithmetic number, because the mean of its divisors is an integer number (128836114).

Almost surely, 2^257672227 is an apocalyptic number.

257672227 is a deficient number, since it is larger than the sum of its proper divisors (1).

257672227 is an equidigital number, since it uses as much as digits as its factorization.

257672227 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 164640, while the sum is 40.

The square root of 257672227 is about 16052.1720337156. The cubic root of 257672227 is about 636.3399707569.

The spelling of 257672227 in words is "two hundred fifty-seven million, six hundred seventy-two thousand, two hundred twenty-seven".