623901421 has 8 divisors (see below), whose sum is σ = 732975264. Its totient is φ = 523553520.

The previous prime is 623901409. The next prime is 623901431. The reversal of 623901421 is 124109326.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 623901421 - 2¹¹ = 623899373 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 623901421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (623901431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2181331 + ... + 2181616.

It is an arithmetic number, because the mean of its divisors is an integer number (91621908).

Almost surely, 2^623901421 is an apocalyptic number.

It is an amenable number.

623901421 is a deficient number, since it is larger than the sum of its proper divisors (109073843).

623901421 is a wasteful number, since it uses less digits than its factorization.

623901421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4362971.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 623901421 is about 24978.0187564987. The cubic root of 623901421 is about 854.4867345659.

The spelling of 623901421 in words is "six hundred twenty-three million, nine hundred one thousand, four hundred twenty-one".