624876421 has 16 divisors (see below), whose sum is σ = 688633344. Its totient is φ = 563410944.

The previous prime is 624876401. The next prime is 624876433. The reversal of 624876421 is 124678426.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 624876421 - 2¹⁹ = 624352133 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 (624876401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 541381 + ... + 542533.

It is an arithmetic number, because the mean of its divisors is an integer number (43039584).

Almost surely, 2^624876421 is an apocalyptic number.

It is an amenable number.

624876421 is a deficient number, since it is larger than the sum of its proper divisors (63756923).

624876421 is a wasteful number, since it uses less digits than its factorization.

624876421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2100.

The product of its digits is 129024, while the sum is 40.

The square root of 624876421 is about 24997.5282978138. The cubic root of 624876421 is about 854.9316183926.

The spelling of 624876421 in words is "six hundred twenty-four million, eight hundred seventy-six thousand, four hundred twenty-one".