257468509 has 4 divisors (see below), whose sum is σ = 268662816. Its totient is φ = 246274204.

The previous prime is 257468501. The next prime is 257468513. The reversal of 257468509 is 905864752.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 257468509 - 2³ = 257468501 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257468501) 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, 5597119 + ... + 5597164.

It is an arithmetic number, because the mean of its divisors is an integer number (67165704).

Almost surely, 2^257468509 is an apocalyptic number.

It is an amenable number.

257468509 is a deficient number, since it is larger than the sum of its proper divisors (11194307).

257468509 is a wasteful number, since it uses less digits than its factorization.

257468509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11194306.

The product of its (nonzero) digits is 604800, while the sum is 46.

The square root of 257468509 is about 16045.8252826086. The cubic root of 257468509 is about 636.1722278251.

The spelling of 257468509 in words is "two hundred fifty-seven million, four hundred sixty-eight thousand, five hundred nine".