624743421 has 16 divisors (see below), whose sum is σ = 891907200. Its totient is φ = 387588608.

The previous prime is 624743381. The next prime is 624743429. The reversal of 624743421 is 124347426.

It is a cyclic number.

It is not a de Polignac number, because 624743421 - 2²² = 620549117 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (624743429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64281 + ... + 73358.

It is an arithmetic number, because the mean of its divisors is an integer number (55744200).

Almost surely, 2^624743421 is an apocalyptic number.

It is an amenable number.

624743421 is a deficient number, since it is larger than the sum of its proper divisors (267163779).

624743421 is a wasteful number, since it uses less digits than its factorization.

624743421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137748.

The product of its digits is 32256, while the sum is 33.

The square root of 624743421 is about 24994.8678932296. The cubic root of 624743421 is about 854.8709589461.

The spelling of 624743421 in words is "six hundred twenty-four million, seven hundred forty-three thousand, four hundred twenty-one".