257324539 has 4 divisors (see below), whose sum is σ = 257919256. Its totient is φ = 256729824.

The previous prime is 257324533. The next prime is 257324549. The reversal of 257324539 is 935423752.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 257324539 - 2¹⁷ = 257193467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (257324533) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 296709 + ... + 297574.

It is an arithmetic number, because the mean of its divisors is an integer number (64479814).

Almost surely, 2^257324539 is an apocalyptic number.

257324539 is a deficient number, since it is larger than the sum of its proper divisors (594717).

257324539 is an equidigital number, since it uses as much as digits as its factorization.

257324539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 594716.

The product of its digits is 226800, while the sum is 40.

The square root of 257324539 is about 16041.3384416638. The cubic root of 257324539 is about 636.0536284763.

The spelling of 257324539 in words is "two hundred fifty-seven million, three hundred twenty-four thousand, five hundred thirty-nine".