624421723 has 2 divisors, whose sum is σ = 624421724. Its totient is φ = 624421722.

The previous prime is 624421711. The next prime is 624421739. The reversal of 624421723 is 327124426.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 624421723 - 2¹⁷ = 624290651 is a prime.

It is equal to p_32531746 and since 624421723 and 32531746 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (624421753) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312210861 + 312210862.

It is an arithmetic number, because the mean of its divisors is an integer number (312210862).

Almost surely, 2^624421723 is an apocalyptic number.

624421723 is a deficient number, since it is larger than the sum of its proper divisors (1).

624421723 is an equidigital number, since it uses as much as digits as its factorization.

624421723 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16128, while the sum is 31.

The square root of 624421723 is about 24988.4317835274. The cubic root of 624421723 is about 854.7242013677.

The spelling of 624421723 in words is "six hundred twenty-four million, four hundred twenty-one thousand, seven hundred twenty-three".