624731 has 2 divisors, whose sum is σ = 624732. Its totient is φ = 624730.

The previous prime is 624727. The next prime is 624737. The reversal of 624731 is 137426.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 624731 - 2² = 624727 is a prime.

It is a super-2 number, since 2×624731² = 780577644722, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 624697 and 624706.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 624731.

It is not a weakly prime, because it can be changed into another prime (624737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312365 + 312366.

It is an arithmetic number, because the mean of its divisors is an integer number (312366).

2⁶²⁴⁷³¹ is an apocalyptic number.

624731 is a deficient number, since it is larger than the sum of its proper divisors (1).

624731 is an equidigital number, since it uses as much as digits as its factorization.

624731 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 624731 is about 790.3992661940. The cubic root of 624731 is about 85.4865293462.

The spelling of 624731 in words is "six hundred twenty-four thousand, seven hundred thirty-one".