264394919 has 2 divisors, whose sum is σ = 264394920. Its totient is φ = 264394918.

The previous prime is 264394891. The next prime is 264394951. The reversal of 264394919 is 919493462.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 264394919 - 2²⁴ = 247617703 is a prime.

It is a super-2 number, since 2×264394919² = 139809346386033122, 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 (264394219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132197459 + 132197460.

It is an arithmetic number, because the mean of its divisors is an integer number (132197460).

Almost surely, 2^264394919 is an apocalyptic number.

264394919 is a deficient number, since it is larger than the sum of its proper divisors (1).

264394919 is an equidigital number, since it uses as much as digits as its factorization.

264394919 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 419904, while the sum is 47.

The square root of 264394919 is about 16260.2250599431. The cubic root of 264394919 is about 641.8265844702.

The spelling of 264394919 in words is "two hundred sixty-four million, three hundred ninety-four thousand, nine hundred nineteen".