264040631 has 2 divisors, whose sum is σ = 264040632. Its totient is φ = 264040630.

The previous prime is 264040591. The next prime is 264040633. The reversal of 264040631 is 136040462.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-264040631 is a prime.

It is a super-2 number, since 2×264040631² = 139434909637756322, which contains 22 as substring.

Together with 264040633, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 264040631.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (264040633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132020315 + 132020316.

It is an arithmetic number, because the mean of its divisors is an integer number (132020316).

Almost surely, 2^264040631 is an apocalyptic number.

264040631 is a deficient number, since it is larger than the sum of its proper divisors (1).

264040631 is an equidigital number, since it uses as much as digits as its factorization.

264040631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 264040631 is about 16249.3270937599. The cubic root of 264040631 is about 641.5397747471.

The spelling of 264040631 in words is "two hundred sixty-four million, forty thousand, six hundred thirty-one".