268915807 has 2 divisors, whose sum is σ = 268915808. Its totient is φ = 268915806.

The previous prime is 268915789. The next prime is 268915819. The reversal of 268915807 is 708519862.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 268915807 - 2¹¹ = 268913759 is a prime.

It is a super-2 number, since 2×268915807² = 144631422508922498, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (268915847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134457903 + 134457904.

It is an arithmetic number, because the mean of its divisors is an integer number (134457904).

Almost surely, 2^268915807 is an apocalyptic number.

268915807 is a deficient number, since it is larger than the sum of its proper divisors (1).

268915807 is an equidigital number, since it uses as much as digits as its factorization.

268915807 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 241920, while the sum is 46.

The square root of 268915807 is about 16398.6525970886. The cubic root of 268915807 is about 645.4641268149.

It can be divided in two parts, 2689 and 15807, that added together give a square (18496 = 136²).

The spelling of 268915807 in words is "two hundred sixty-eight million, nine hundred fifteen thousand, eight hundred seven".