624013421 has 2 divisors, whose sum is σ = 624013422. Its totient is φ = 624013420.

The previous prime is 624013381. The next prime is 624013471. The reversal of 624013421 is 124310426.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 446857321 + 177156100 = 21139^2 + 13310^2 .

It is a cyclic number.

It is not a de Polignac number, because 624013421 - 2¹⁸ = 623751277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (624013471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312006710 + 312006711.

It is an arithmetic number, because the mean of its divisors is an integer number (312006711).

Almost surely, 2^624013421 is an apocalyptic number.

It is an amenable number.

624013421 is a deficient number, since it is larger than the sum of its proper divisors (1).

624013421 is an equidigital number, since it uses as much as digits as its factorization.

624013421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 624013421 is about 24980.2606271432. The cubic root of 624013421 is about 854.5378627222.

Adding to 624013421 its reverse (124310426), we get a palindrome (748323847).

The spelling of 624013421 in words is "six hundred twenty-four million, thirteen thousand, four hundred twenty-one".