264786839 has 2 divisors, whose sum is σ = 264786840. Its totient is φ = 264786838.

The previous prime is 264786811. The next prime is 264786853. The reversal of 264786839 is 938687462.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-264786839 is a prime.

It is a super-2 number, since 2×264786839² = 140224140215223842, 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 (264786139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132393419 + 132393420.

It is an arithmetic number, because the mean of its divisors is an integer number (132393420).

Almost surely, 2^264786839 is an apocalyptic number.

264786839 is a deficient number, since it is larger than the sum of its proper divisors (1).

264786839 is an equidigital number, since it uses as much as digits as its factorization.

264786839 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3483648, while the sum is 53.

The square root of 264786839 is about 16272.2720908913. The cubic root of 264786839 is about 642.1435604136.

The spelling of 264786839 in words is "two hundred sixty-four million, seven hundred eighty-six thousand, eight hundred thirty-nine".