624494321 has 8 divisors (see below), whose sum is σ = 710887104. Its totient is φ = 543038320.

The previous prime is 624494317. The next prime is 624494357. The reversal of 624494321 is 123494426.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 624494321 - 2² = 624494317 is a prime.

It is a super-2 number, since 2×624494321² = 779986313922502082, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (624494021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1233926 + ... + 1234431.

It is an arithmetic number, because the mean of its divisors is an integer number (88860888).

Almost surely, 2^624494321 is an apocalyptic number.

It is an amenable number.

624494321 is a deficient number, since it is larger than the sum of its proper divisors (86392783).

624494321 is a wasteful number, since it uses less digits than its factorization.

624494321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2468391.

The product of its digits is 41472, while the sum is 35.

The square root of 624494321 is about 24989.8843734820. The cubic root of 624494321 is about 854.7573247418.

The spelling of 624494321 in words is "six hundred twenty-four million, four hundred ninety-four thousand, three hundred twenty-one".