264565919 has 2 divisors, whose sum is σ = 264565920. Its totient is φ = 264565918.

The previous prime is 264565891. The next prime is 264565933. The reversal of 264565919 is 919565462.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 264565919 - 2¹² = 264561823 is a prime.

It is a super-2 number, since 2×264565919² = 139990250992629122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (264565949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132282959 + 132282960.

It is an arithmetic number, because the mean of its divisors is an integer number (132282960).

Almost surely, 2^264565919 is an apocalyptic number.

264565919 is a deficient number, since it is larger than the sum of its proper divisors (1).

264565919 is an equidigital number, since it uses as much as digits as its factorization.

264565919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 583200, while the sum is 47.

The square root of 264565919 is about 16265.4824398171. The cubic root of 264565919 is about 641.9649238575.

The spelling of 264565919 in words is "two hundred sixty-four million, five hundred sixty-five thousand, nine hundred nineteen".