257292239 has 2 divisors, whose sum is σ = 257292240. Its totient is φ = 257292238.

The previous prime is 257292227. The next prime is 257292257. The reversal of 257292239 is 932292752.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 257292239 - 2¹⁶ = 257226703 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 257292196 and 257292205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (257294239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128646119 + 128646120.

It is an arithmetic number, because the mean of its divisors is an integer number (128646120).

Almost surely, 2^257292239 is an apocalyptic number.

257292239 is a deficient number, since it is larger than the sum of its proper divisors (1).

257292239 is an equidigital number, since it uses as much as digits as its factorization.

257292239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 136080, while the sum is 41.

The square root of 257292239 is about 16040.3316362225. The cubic root of 257292239 is about 636.0270143648.

The spelling of 257292239 in words is "two hundred fifty-seven million, two hundred ninety-two thousand, two hundred thirty-nine".