257013667 has 4 divisors (see below), whose sum is σ = 272132136. Its totient is φ = 241895200.

The previous prime is 257013649. The next prime is 257013683. The reversal of 257013667 is 766310752.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-257013667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (257013697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7559209 + ... + 7559242.

It is an arithmetic number, because the mean of its divisors is an integer number (68033034).

Almost surely, 2^257013667 is an apocalyptic number.

257013667 is a deficient number, since it is larger than the sum of its proper divisors (15118469).

257013667 is a wasteful number, since it uses less digits than its factorization.

257013667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15118468.

The product of its (nonzero) digits is 52920, while the sum is 37.

The square root of 257013667 is about 16031.6457982329. The cubic root of 257013667 is about 635.7973879278.

The spelling of 257013667 in words is "two hundred fifty-seven million, thirteen thousand, six hundred sixty-seven".