257183393 has 2 divisors, whose sum is σ = 257183394. Its totient is φ = 257183392.

The previous prime is 257183363. The next prime is 257183461. The reversal of 257183393 is 393381752.

257183393 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 248755984 + 8427409 = 15772^2 + 2903^2 .

It is a cyclic number.

It is not a de Polignac number, because 257183393 - 2¹² = 257179297 is a prime.

It is a super-2 number, since 2×257183393² = 132286595269984898, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 257183393.

It is not a weakly prime, because it can be changed into another prime (257183323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128591696 + 128591697.

It is an arithmetic number, because the mean of its divisors is an integer number (128591697).

Almost surely, 2^257183393 is an apocalyptic number.

It is an amenable number.

257183393 is a deficient number, since it is larger than the sum of its proper divisors (1).

257183393 is an equidigital number, since it uses as much as digits as its factorization.

257183393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 136080, while the sum is 41.

The square root of 257183393 is about 16036.9383923491. The cubic root of 257183393 is about 635.9373125258.

The spelling of 257183393 in words is "two hundred fifty-seven million, one hundred eighty-three thousand, three hundred ninety-three".