257357479 has 2 divisors, whose sum is σ = 257357480. Its totient is φ = 257357478.

The previous prime is 257357467. The next prime is 257357549. The reversal of 257357479 is 974753752.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 257357479 - 2¹⁷ = 257226407 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (257352479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128678739 + 128678740.

It is an arithmetic number, because the mean of its divisors is an integer number (128678740).

Almost surely, 2^257357479 is an apocalyptic number.

257357479 is a deficient number, since it is larger than the sum of its proper divisors (1).

257357479 is an equidigital number, since it uses as much as digits as its factorization.

257357479 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1852200, while the sum is 49.

The square root of 257357479 is about 16042.3651311146. The cubic root of 257357479 is about 636.0807676325.

The spelling of 257357479 in words is "two hundred fifty-seven million, three hundred fifty-seven thousand, four hundred seventy-nine".