621069812 has 48 divisors (see below), whose sum is σ = 1225416192. Its totient is φ = 272976480.

The previous prime is 621069811. The next prime is 621069859. The reversal of 621069812 is 218960126.

It is a super-2 number, since 2×621069812² = 771455422755430688, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621069811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 193283 + ... + 196469.

It is an arithmetic number, because the mean of its divisors is an integer number (25529504).

Almost surely, 2^621069812 is an apocalyptic number.

It is an amenable number.

621069812 is a deficient number, since it is larger than the sum of its proper divisors (604346380).

621069812 is a wasteful number, since it uses less digits than its factorization.

621069812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3348 (or 3346 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 621069812 is about 24921.2722789187. The cubic root of 621069812 is about 853.1920631346.

The spelling of 621069812 in words is "six hundred twenty-one million, sixty-nine thousand, eight hundred twelve".