268915657 has 2 divisors, whose sum is σ = 268915658. Its totient is φ = 268915656.

The previous prime is 268915651. The next prime is 268915663. The reversal of 268915657 is 756519862.

It is a balanced prime because it is at equal distance from previous prime (268915651) and next prime (268915663).

It can be written as a sum of positive squares in only one way, i.e., 252682816 + 16232841 = 15896^2 + 4029^2 .

It is a cyclic number.

It is not a de Polignac number, because 268915657 - 2³ = 268915649 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 268915657.

It is not a weakly prime, because it can be changed into another prime (268915651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134457828 + 134457829.

It is an arithmetic number, because the mean of its divisors is an integer number (134457829).

Almost surely, 2^268915657 is an apocalyptic number.

It is an amenable number.

268915657 is a deficient number, since it is larger than the sum of its proper divisors (1).

268915657 is an equidigital number, since it uses as much as digits as its factorization.

268915657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 907200, while the sum is 49.

The square root of 268915657 is about 16398.6480235415. The cubic root of 268915657 is about 645.4640068026.

The spelling of 268915657 in words is "two hundred sixty-eight million, nine hundred fifteen thousand, six hundred fifty-seven".