257939401 has 2 divisors, whose sum is σ = 257939402. Its totient is φ = 257939400.

The previous prime is 257939387. The next prime is 257939447. The reversal of 257939401 is 104939752.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 244609600 + 13329801 = 15640^2 + 3651^2 .

It is a cyclic number.

It is not a de Polignac number, because 257939401 - 2¹³ = 257931209 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (257939701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128969700 + 128969701.

It is an arithmetic number, because the mean of its divisors is an integer number (128969701).

Almost surely, 2^257939401 is an apocalyptic number.

It is an amenable number.

257939401 is a deficient number, since it is larger than the sum of its proper divisors (1).

257939401 is an equidigital number, since it uses as much as digits as its factorization.

257939401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 68040, while the sum is 40.

The square root of 257939401 is about 16060.4919289541. The cubic root of 257939401 is about 636.5598298782.

The spelling of 257939401 in words is "two hundred fifty-seven million, nine hundred thirty-nine thousand, four hundred one".