264667631 has 2 divisors, whose sum is σ = 264667632. Its totient is φ = 264667630.

The previous prime is 264667609. The next prime is 264667651. The reversal of 264667631 is 136766462.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 264667631 - 2⁶ = 264667567 is a prime.

It is a super-3 number, since 3×264667631³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (264667651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132333815 + 132333816.

It is an arithmetic number, because the mean of its divisors is an integer number (132333816).

Almost surely, 2^264667631 is an apocalyptic number.

264667631 is a deficient number, since it is larger than the sum of its proper divisors (1).

264667631 is an equidigital number, since it uses as much as digits as its factorization.

264667631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 217728, while the sum is 41.

The square root of 264667631 is about 16268.6087604319. The cubic root of 264667631 is about 642.0471808249.

The spelling of 264667631 in words is "two hundred sixty-four million, six hundred sixty-seven thousand, six hundred thirty-one".