257673913 has 8 divisors (see below), whose sum is σ = 311807232. Its totient is φ = 207871296.

The previous prime is 257673859. The next prime is 257673917. The reversal of 257673913 is 319376752.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 257673913 - 2⁹ = 257673401 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 257673913.

It is not an unprimeable number, because it can be changed into a prime (257673917) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1082545 + ... + 1082782.

It is an arithmetic number, because the mean of its divisors is an integer number (38975904).

Almost surely, 2^257673913 is an apocalyptic number.

It is an amenable number.

257673913 is a deficient number, since it is larger than the sum of its proper divisors (54133319).

257673913 is a wasteful number, since it uses less digits than its factorization.

257673913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2165351.

The product of its digits is 238140, while the sum is 43.

The square root of 257673913 is about 16052.2245498872. The cubic root of 257673913 is about 636.3413586530.

It can be divided in two parts, 2576739 and 13, that added together give a palindrome (2576752).

The spelling of 257673913 in words is "two hundred fifty-seven million, six hundred seventy-three thousand, nine hundred thirteen".