268564693 has 2 divisors, whose sum is σ = 268564694. Its totient is φ = 268564692.

The previous prime is 268564661. The next prime is 268564783. The reversal of 268564693 is 396465862.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 159946609 + 108618084 = 12647^2 + 10422^2 .

It is a cyclic number.

It is not a de Polignac number, because 268564693 - 2⁵ = 268564661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (268564613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134282346 + 134282347.

It is an arithmetic number, because the mean of its divisors is an integer number (134282347).

Almost surely, 2^268564693 is an apocalyptic number.

It is an amenable number.

268564693 is a deficient number, since it is larger than the sum of its proper divisors (1).

268564693 is an equidigital number, since it uses as much as digits as its factorization.

268564693 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1866240, while the sum is 49.

The square root of 268564693 is about 16387.9435256532. The cubic root of 268564693 is about 645.1830844563.

The spelling of 268564693 in words is "two hundred sixty-eight million, five hundred sixty-four thousand, six hundred ninety-three".