724631 has 2 divisors, whose sum is σ = 724632. Its totient is φ = 724630.

The previous prime is 724627. The next prime is 724639. The reversal of 724631 is 136427.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 724631 - 2² = 724627 is a prime.

It is a super-2 number, since 2×724631² = 1050180172322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 724597 and 724606.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (724639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 362315 + 362316.

It is an arithmetic number, because the mean of its divisors is an integer number (362316).

2⁷²⁴⁶³¹ is an apocalyptic number.

724631 is a deficient number, since it is larger than the sum of its proper divisors (1).

724631 is an equidigital number, since it uses as much as digits as its factorization.

724631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1008, while the sum is 23.

The square root of 724631 is about 851.2526064571. The cubic root of 724631 is about 89.8198453832.

The spelling of 724631 in words is "seven hundred twenty-four thousand, six hundred thirty-one".