724605631 has 2 divisors, whose sum is σ = 724605632. Its totient is φ = 724605630.

The previous prime is 724605619. The next prime is 724605647. The reversal of 724605631 is 136506427.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-724605631 is a prime.

It is a super-2 number, since 2×724605631² = 1050106640953816322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (724600631) 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, 362302815 + 362302816.

It is an arithmetic number, because the mean of its divisors is an integer number (362302816).

Almost surely, 2^724605631 is an apocalyptic number.

724605631 is a deficient number, since it is larger than the sum of its proper divisors (1).

724605631 is an equidigital number, since it uses as much as digits as its factorization.

724605631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 724605631 is about 26918.4997910359. The cubic root of 724605631 is about 898.1879718706.

The spelling of 724605631 in words is "seven hundred twenty-four million, six hundred five thousand, six hundred thirty-one".