257869607 has 2 divisors, whose sum is σ = 257869608. Its totient is φ = 257869606.

The previous prime is 257869567. The next prime is 257869609. The reversal of 257869607 is 706968752.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 257869607 - 2¹⁸ = 257607463 is a prime.

Together with 257869609, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (257869609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128934803 + 128934804.

It is an arithmetic number, because the mean of its divisors is an integer number (128934804).

Almost surely, 2^257869607 is an apocalyptic number.

257869607 is a deficient number, since it is larger than the sum of its proper divisors (1).

257869607 is an equidigital number, since it uses as much as digits as its factorization.

257869607 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1270080, while the sum is 50.

The square root of 257869607 is about 16058.3189344340. The cubic root of 257869607 is about 636.5024106234.

The spelling of 257869607 in words is "two hundred fifty-seven million, eight hundred sixty-nine thousand, six hundred seven".