257713573 has 4 divisors (see below), whose sum is σ = 277537708. Its totient is φ = 237889440.

The previous prime is 257713553. The next prime is 257713583. The reversal of 257713573 is 375317752.

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

It can be written as a sum of positive squares in 2 ways, for example, as 15382084 + 242331489 = 3922^2 + 15567^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-257713573 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257713553) 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, 9912048 + ... + 9912073.

It is an arithmetic number, because the mean of its divisors is an integer number (69384427).

Almost surely, 2^257713573 is an apocalyptic number.

It is an amenable number.

257713573 is a deficient number, since it is larger than the sum of its proper divisors (19824135).

257713573 is a wasteful number, since it uses less digits than its factorization.

257713573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19824134.

The product of its digits is 154350, while the sum is 40.

The square root of 257713573 is about 16053.4598451549. The cubic root of 257713573 is about 636.3740045701.

The spelling of 257713573 in words is "two hundred fifty-seven million, seven hundred thirteen thousand, five hundred seventy-three".