724621631 has 2 divisors, whose sum is σ = 724621632. Its totient is φ = 724621630.

The previous prime is 724621589. The next prime is 724621643. The reversal of 724621631 is 136126427.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 724621631 - 2⁶ = 724621567 is a prime.

It is a super-2 number, since 2×724621631² = 1050153016226200322, 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 (724621691) 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, 362310815 + 362310816.

It is an arithmetic number, because the mean of its divisors is an integer number (362310816).

Almost surely, 2^724621631 is an apocalyptic number.

724621631 is a deficient number, since it is larger than the sum of its proper divisors (1).

724621631 is an equidigital number, since it uses as much as digits as its factorization.

724621631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 32.

The square root of 724621631 is about 26918.7969827777. The cubic root of 724621631 is about 898.1945827779.

The spelling of 724621631 in words is "seven hundred twenty-four million, six hundred twenty-one thousand, six hundred thirty-one".