257863069 has 2 divisors, whose sum is σ = 257863070. Its totient is φ = 257863068.

The previous prime is 257863057. The next prime is 257863141. The reversal of 257863069 is 960368752.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 140422500 + 117440569 = 11850^2 + 10837^2 .

It is a cyclic number.

It is not a de Polignac number, because 257863069 - 2⁵ = 257863037 is a prime.

It is a super-2 number, since 2×257863069² = 132986724708197522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (257863169) 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, 128931534 + 128931535.

It is an arithmetic number, because the mean of its divisors is an integer number (128931535).

Almost surely, 2^257863069 is an apocalyptic number.

It is an amenable number.

257863069 is a deficient number, since it is larger than the sum of its proper divisors (1).

257863069 is an equidigital number, since it uses as much as digits as its factorization.

257863069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 544320, while the sum is 46.

The square root of 257863069 is about 16058.1153626445. The cubic root of 257863069 is about 636.4970313054.

The spelling of 257863069 in words is "two hundred fifty-seven million, eight hundred sixty-three thousand, sixty-nine".