257752403 has 2 divisors, whose sum is σ = 257752404. Its totient is φ = 257752402.

The previous prime is 257752387. The next prime is 257752427. The reversal of 257752403 is 304257752.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 257752403 - 2⁴ = 257752387 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (257752603) 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 as a sum of consecutive naturals, namely, 128876201 + 128876202.

It is an arithmetic number, because the mean of its divisors is an integer number (128876202).

Almost surely, 2^257752403 is an apocalyptic number.

257752403 is a deficient number, since it is larger than the sum of its proper divisors (1).

257752403 is an equidigital number, since it uses as much as digits as its factorization.

257752403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 58800, while the sum is 35.

The square root of 257752403 is about 16054.6691962183. The cubic root of 257752403 is about 636.4059640324.

The spelling of 257752403 in words is "two hundred fifty-seven million, seven hundred fifty-two thousand, four hundred three".