623716221 has 16 divisors (see below), whose sum is σ = 838575488. Its totient is φ = 412344000.

The previous prime is 623716217. The next prime is 623716229. The reversal of 623716221 is 122617326.

It is not a de Polignac number, because 623716221 - 2² = 623716217 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (623716229) 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 in 15 ways as a sum of consecutive naturals, for example, 450951 + ... + 452331.

It is an arithmetic number, because the mean of its divisors is an integer number (52410968).

Almost surely, 2^623716221 is an apocalyptic number.

It is an amenable number.

623716221 is a deficient number, since it is larger than the sum of its proper divisors (214859267).

623716221 is a wasteful number, since it uses less digits than its factorization.

623716221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2532.

The product of its digits is 6048, while the sum is 30.

The square root of 623716221 is about 24974.3112217334. The cubic root of 623716221 is about 854.4021770813.

The spelling of 623716221 in words is "six hundred twenty-three million, seven hundred sixteen thousand, two hundred twenty-one".