257755087 has 2 divisors, whose sum is σ = 257755088. Its totient is φ = 257755086.

The previous prime is 257755081. The next prime is 257755133. The reversal of 257755087 is 780557752.

It is an a-pointer prime, because the next prime (257755133) can be obtained adding 257755087 to its sum of digits (46).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 257755087 - 2³ = 257755079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (257755081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128877543 + 128877544.

It is an arithmetic number, because the mean of its divisors is an integer number (128877544).

Almost surely, 2^257755087 is an apocalyptic number.

257755087 is a deficient number, since it is larger than the sum of its proper divisors (1).

257755087 is an equidigital number, since it uses as much as digits as its factorization.

257755087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 686000, while the sum is 46.

The square root of 257755087 is about 16054.7527853904. The cubic root of 257755087 is about 636.4081730098.

The spelling of 257755087 in words is "two hundred fifty-seven million, seven hundred fifty-five thousand, eighty-seven".