257877343 has 2 divisors, whose sum is σ = 257877344. Its totient is φ = 257877342.

The previous prime is 257877337. The next prime is 257877379. The reversal of 257877343 is 343778752.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-257877343 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 257877293 and 257877302.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (257877043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128938671 + 128938672.

It is an arithmetic number, because the mean of its divisors is an integer number (128938672).

Almost surely, 2^257877343 is an apocalyptic number.

257877343 is a deficient number, since it is larger than the sum of its proper divisors (1).

257877343 is an equidigital number, since it uses as much as digits as its factorization.

257877343 is an evil number, because the sum of its binary digits is even.

The product of its digits is 987840, while the sum is 46.

The square root of 257877343 is about 16058.5598046649. The cubic root of 257877343 is about 636.5087755113.

The spelling of 257877343 in words is "two hundred fifty-seven million, eight hundred seventy-seven thousand, three hundred forty-three".