624081993 has 4 divisors (see below), whose sum is σ = 832109328. Its totient is φ = 416054660.

The previous prime is 624081989. The next prime is 624082003. The reversal of 624081993 is 399180426.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 624081993 - 2² = 624081989 is a prime.

It is not an unprimeable number, because it can be changed into a prime (624081193) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104013663 + ... + 104013668.

It is an arithmetic number, because the mean of its divisors is an integer number (208027332).

Almost surely, 2^624081993 is an apocalyptic number.

It is an amenable number.

624081993 is a deficient number, since it is larger than the sum of its proper divisors (208027335).

624081993 is a wasteful number, since it uses less digits than its factorization.

624081993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208027334.

The product of its (nonzero) digits is 93312, while the sum is 42.

The square root of 624081993 is about 24981.6331131493. The cubic root of 624081993 is about 854.5691629165.

The spelling of 624081993 in words is "six hundred twenty-four million, eighty-one thousand, nine hundred ninety-three".