257413939 has 4 divisors (see below), whose sum is σ = 257507080. Its totient is φ = 257320800.

The previous prime is 257413927. The next prime is 257413963. The reversal of 257413939 is 939314752.

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 257413939 - 2⁷ = 257413811 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 257413895 and 257413904.

It is not an unprimeable number, because it can be changed into a prime (257417939) 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, 42294 + ... + 47995.

It is an arithmetic number, because the mean of its divisors is an integer number (64376770).

Almost surely, 2^257413939 is an apocalyptic number.

257413939 is a deficient number, since it is larger than the sum of its proper divisors (93141).

257413939 is an equidigital number, since it uses as much as digits as its factorization.

257413939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93140.

The product of its digits is 204120, while the sum is 43.

The square root of 257413939 is about 16044.1247502006. The cubic root of 257413939 is about 636.1272794525.

The spelling of 257413939 in words is "two hundred fifty-seven million, four hundred thirteen thousand, nine hundred thirty-nine".