621347900 has 18 divisors (see below), whose sum is σ = 1348325160. Its totient is φ = 248539120.

The previous prime is 621347879. The next prime is 621347929. The reversal of 621347900 is 9743126.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3106640 + ... + 3106839.

Almost surely, 2^621347900 is an apocalyptic number.

It is an amenable number.

621347900 is an abundant number, since it is smaller than the sum of its proper divisors (726977260).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

621347900 is a wasteful number, since it uses less digits than its factorization.

621347900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6213493 (or 6213486 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 621347900 is about 24926.8509844304. The cubic root of 621347900 is about 853.3193848767.

The spelling of 621347900 in words is "six hundred twenty-one million, three hundred forty-seven thousand, nine hundred".