868018257 has 12 divisors (see below), whose sum is σ = 1284385284. Its totient is φ = 564564480.

The previous prime is 868018241. The next prime is 868018289. The reversal of 868018257 is 752810868.

It can be written as a sum of positive squares in 2 ways, for example, as 488586816 + 379431441 = 22104^2 + 19479^2 .

It is not a de Polignac number, because 868018257 - 2⁴ = 868018241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (868018237) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1175808 + ... + 1176545.

It is an arithmetic number, because the mean of its divisors is an integer number (107032107).

Almost surely, 2^868018257 is an apocalyptic number.

It is an amenable number.

868018257 is a deficient number, since it is larger than the sum of its proper divisors (416367027).

868018257 is a wasteful number, since it uses less digits than its factorization.

868018257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2352400 (or 2352397 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 45.

The square root of 868018257 is about 29462.1495651624. The cubic root of 868018257 is about 953.9148724853.

The spelling of 868018257 in words is "eight hundred sixty-eight million, eighteen thousand, two hundred fifty-seven".