257853889 has 2 divisors, whose sum is σ = 257853890. Its totient is φ = 257853888.

The previous prime is 257853881. The next prime is 257853901. The reversal of 257853889 is 988358752.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 209091600 + 48762289 = 14460^2 + 6983^2 .

It is a cyclic number.

It is not a de Polignac number, because 257853889 - 2³ = 257853881 is a prime.

It is not a weakly prime, because it can be changed into another prime (257853881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128926944 + 128926945.

It is an arithmetic number, because the mean of its divisors is an integer number (128926945).

Almost surely, 2^257853889 is an apocalyptic number.

It is an amenable number.

257853889 is a deficient number, since it is larger than the sum of its proper divisors (1).

257853889 is an equidigital number, since it uses as much as digits as its factorization.

257853889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4838400, while the sum is 55.

The square root of 257853889 is about 16057.8295233198. The cubic root of 257853889 is about 636.4894780561.

The spelling of 257853889 in words is "two hundred fifty-seven million, eight hundred fifty-three thousand, eight hundred eighty-nine".