624311997 has 16 divisors (see below), whose sum is σ = 842160000. Its totient is φ = 411355584.

The previous prime is 624311993. The next prime is 624312001. The reversal of 624311997 is 799113426.

It is an interprime number because it is at equal distance from previous prime (624311993) and next prime (624312001).

It is not a de Polignac number, because 624311997 - 2² = 624311993 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (624311993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 141379 + ... + 145727.

It is an arithmetic number, because the mean of its divisors is an integer number (52635000).

Almost surely, 2^624311997 is an apocalyptic number.

It is an amenable number.

624311997 is a deficient number, since it is larger than the sum of its proper divisors (217848003).

624311997 is a wasteful number, since it uses less digits than its factorization.

624311997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4900.

The product of its digits is 81648, while the sum is 42.

The square root of 624311997 is about 24986.2361511293. The cubic root of 624311997 is about 854.6741331963.

The spelling of 624311997 in words is "six hundred twenty-four million, three hundred eleven thousand, nine hundred ninety-seven".