268649519 has 2 divisors, whose sum is σ = 268649520. Its totient is φ = 268649518.

The previous prime is 268649471. The next prime is 268649561. The reversal of 268649519 is 915946862.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 268649519 - 2²⁸ = 214063 is a prime.

It is a super-2 number, since 2×268649519² = 144345128117862722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (268648519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134324759 + 134324760.

It is an arithmetic number, because the mean of its divisors is an integer number (134324760).

Almost surely, 2^268649519 is an apocalyptic number.

268649519 is a deficient number, since it is larger than the sum of its proper divisors (1).

268649519 is an equidigital number, since it uses as much as digits as its factorization.

268649519 is an evil number, because the sum of its binary digits is even.

The product of its digits is 933120, while the sum is 50.

The square root of 268649519 is about 16390.5313824781. The cubic root of 268649519 is about 645.2510042050.

The spelling of 268649519 in words is "two hundred sixty-eight million, six hundred forty-nine thousand, five hundred nineteen".