257397339 has 8 divisors (see below), whose sum is σ = 343429632. Its totient is φ = 171481640.

The previous prime is 257397337. The next prime is 257397341. The reversal of 257397339 is 933793752.

It is an interprime number because it is at equal distance from previous prime (257397337) and next prime (257397341).

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 257397339 - 2¹ = 257397337 is a prime.

It is not an unprimeable number, because it can be changed into a prime (257397331) 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, 23859 + ... + 32924.

It is an arithmetic number, because the mean of its divisors is an integer number (42928704).

Almost surely, 2^257397339 is an apocalyptic number.

257397339 is a deficient number, since it is larger than the sum of its proper divisors (86032293).

257397339 is a wasteful number, since it uses less digits than its factorization.

257397339 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58297.

The product of its digits is 1071630, while the sum is 48.

The square root of 257397339 is about 16043.6074185328. The cubic root of 257397339 is about 636.1136050572.

The spelling of 257397339 in words is "two hundred fifty-seven million, three hundred ninety-seven thousand, three hundred thirty-nine".