264664769 has 2 divisors, whose sum is σ = 264664770. Its totient is φ = 264664768.

The previous prime is 264664723. The next prime is 264664793. The reversal of 264664769 is 967466462.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 143400625 + 121264144 = 11975^2 + 11012^2 .

It is a cyclic number.

It is not a de Polignac number, because 264664769 - 2²⁴ = 247887553 is a prime.

It is a super-2 number, since 2×264664769² = 140094879899646722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (264664709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132332384 + 132332385.

It is an arithmetic number, because the mean of its divisors is an integer number (132332385).

Almost surely, 2^264664769 is an apocalyptic number.

It is an amenable number.

264664769 is a deficient number, since it is larger than the sum of its proper divisors (1).

264664769 is an equidigital number, since it uses as much as digits as its factorization.

264664769 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2612736, while the sum is 50.

The square root of 264664769 is about 16268.5207993843. The cubic root of 264664769 is about 642.0448665441.

The spelling of 264664769 in words is "two hundred sixty-four million, six hundred sixty-four thousand, seven hundred sixty-nine".