257670343 has 16 divisors (see below), whose sum is σ = 328216320. Its totient is φ = 196926336.

The previous prime is 257670317. The next prime is 257670349. The reversal of 257670343 is 343076752.

It is not a de Polignac number, because 257670343 - 2⁹ = 257669831 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 (257670349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54721 + ... + 59242.

It is an arithmetic number, because the mean of its divisors is an integer number (20513520).

Almost surely, 2^257670343 is an apocalyptic number.

257670343 is a deficient number, since it is larger than the sum of its proper divisors (70545977).

257670343 is a wasteful number, since it uses less digits than its factorization.

257670343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114006.

The product of its (nonzero) digits is 105840, while the sum is 37.

The square root of 257670343 is about 16052.1133499611. The cubic root of 257670343 is about 636.3384198623.

The spelling of 257670343 in words is "two hundred fifty-seven million, six hundred seventy thousand, three hundred forty-three".