257919427 has 8 divisors (see below), whose sum is σ = 273240000. Its totient is φ = 242615424.

The previous prime is 257919413. The next prime is 257919457. The reversal of 257919427 is 724919752.

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 a de Polignac number, because none of the positive numbers 2^k-257919427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (257919457) 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 7 ways as a sum of consecutive naturals, for example, 43974 + ... + 49492.

It is an arithmetic number, because the mean of its divisors is an integer number (34155000).

Almost surely, 2^257919427 is an apocalyptic number.

257919427 is a deficient number, since it is larger than the sum of its proper divisors (15320573).

257919427 is a wasteful number, since it uses less digits than its factorization.

257919427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8285.

The product of its digits is 317520, while the sum is 46.

The square root of 257919427 is about 16059.8700804209. The cubic root of 257919427 is about 636.5433984035.

The spelling of 257919427 in words is "two hundred fifty-seven million, nine hundred nineteen thousand, four hundred twenty-seven".