257924479 has 2 divisors, whose sum is σ = 257924480. Its totient is φ = 257924478.

The previous prime is 257924441. The next prime is 257924503. The reversal of 257924479 is 974429752.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 257924479 - 2⁷ = 257924351 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (257928479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128962239 + 128962240.

It is an arithmetic number, because the mean of its divisors is an integer number (128962240).

Almost surely, 2^257924479 is an apocalyptic number.

257924479 is a deficient number, since it is larger than the sum of its proper divisors (1).

257924479 is an equidigital number, since it uses as much as digits as its factorization.

257924479 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1270080, while the sum is 49.

The square root of 257924479 is about 16060.0273661037. The cubic root of 257924479 is about 636.5475544769.

The spelling of 257924479 in words is "two hundred fifty-seven million, nine hundred twenty-four thousand, four hundred seventy-nine".