621639334 has 4 divisors (see below), whose sum is σ = 932459004. Its totient is φ = 310819666.

The previous prime is 621639287. The next prime is 621639353. The reversal of 621639334 is 433936126.

621639334 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 621639293 and 621639302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155409832 + ... + 155409835.

It is an arithmetic number, because the mean of its divisors is an integer number (233114751).

Almost surely, 2^621639334 is an apocalyptic number.

621639334 is a deficient number, since it is larger than the sum of its proper divisors (310819670).

621639334 is a wasteful number, since it uses less digits than its factorization.

621639334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310819669.

The product of its digits is 69984, while the sum is 37.

The square root of 621639334 is about 24932.6960836569. The cubic root of 621639334 is about 853.4527762832.

The spelling of 621639334 in words is "six hundred twenty-one million, six hundred thirty-nine thousand, three hundred thirty-four".