624121013 has 4 divisors (see below), whose sum is σ = 633436320. Its totient is φ = 614805708.

The previous prime is 624121007. The next prime is 624121033. The reversal of 624121013 is 310121426.

624121013 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 624121013 - 2⁴ = 624120997 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 (624121033) 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, 4657553 + ... + 4657686.

It is an arithmetic number, because the mean of its divisors is an integer number (158359080).

Almost surely, 2^624121013 is an apocalyptic number.

It is an amenable number.

624121013 is a deficient number, since it is larger than the sum of its proper divisors (9315307).

624121013 is an equidigital number, since it uses as much as digits as its factorization.

624121013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9315306.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 624121013 is about 24982.4140747046. The cubic root of 624121013 is about 854.5869728593.

Adding to 624121013 its reverse (310121426), we get a palindrome (934242439).

The spelling of 624121013 in words is "six hundred twenty-four million, one hundred twenty-one thousand, thirteen".