624906013 has 4 divisors (see below), whose sum is σ = 625045248. Its totient is φ = 624766780.

The previous prime is 624905999. The next prime is 624906019. The reversal of 624906013 is 310609426.

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, and also an emirpimes, since its reverse is a distinct semiprime: 310609426 = 2 ⋅155304713.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-624906013 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 (624906019) 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, 62653 + ... + 71938.

It is an arithmetic number, because the mean of its divisors is an integer number (156261312).

Almost surely, 2^624906013 is an apocalyptic number.

It is an amenable number.

624906013 is a deficient number, since it is larger than the sum of its proper divisors (139235).

624906013 is a wasteful number, since it uses less digits than its factorization.

624906013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139234.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 624906013 is about 24998.1201893262. The cubic root of 624906013 is about 854.9451137207.

The spelling of 624906013 in words is "six hundred twenty-four million, nine hundred six thousand, thirteen".