621499972 has 12 divisors (see below), whose sum is σ = 1088952256. Its totient is φ = 310370760.

The previous prime is 621499969. The next prime is 621500003. The reversal of 621499972 is 279994126.

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91104 + ... + 97687.

Almost surely, 2^621499972 is an apocalyptic number.

It is an amenable number.

621499972 is a deficient number, since it is larger than the sum of its proper divisors (467452284).

621499972 is a wasteful number, since it uses less digits than its factorization.

621499972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189618 (or 189616 counting only the distinct ones).

The product of its digits is 489888, while the sum is 49.

The square root of 621499972 is about 24929.9011630612. The cubic root of 621499972 is about 853.3889945111.

The spelling of 621499972 in words is "six hundred twenty-one million, four hundred ninety-nine thousand, nine hundred seventy-two".