421624623 has 8 divisors (see below), whose sum is σ = 642475648. Its totient is φ = 240928344.

The previous prime is 421624559. The next prime is 421624627. The reversal of 421624623 is 326426124.

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

It is not a de Polignac number, because 421624623 - 2⁶ = 421624559 is a prime.

It is the 20534-th Hogben number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421624627) by changing a digit.

It is a nontrivial repunit in base 20533.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10038661 + ... + 10038702.

It is an arithmetic number, because the mean of its divisors is an integer number (80309456).

Almost surely, 2^421624623 is an apocalyptic number.

421624623 is a deficient number, since it is larger than the sum of its proper divisors (220851025).

421624623 is a wasteful number, since it uses less digits than its factorization.

421624623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20077373.

The product of its digits is 13824, while the sum is 30.

The square root of 421624623 is about 20533.5000182628. The cubic root of 421624623 is about 749.8515990826.

The spelling of 421624623 in words is "four hundred twenty-one million, six hundred twenty-four thousand, six hundred twenty-three".