621139700 has 18 divisors (see below), whose sum is σ = 1347873366. Its totient is φ = 248455840.

The previous prime is 621139681. The next prime is 621139703. The reversal of 621139700 is 7931126.

621139700 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 16176484 + 604963216 = 4022^2 + 24596^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621139703) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3105599 + ... + 3105798.

Almost surely, 2^621139700 is an apocalyptic number.

It is an amenable number.

621139700 is an abundant number, since it is smaller than the sum of its proper divisors (726733666).

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

621139700 is a wasteful number, since it uses less digits than its factorization.

621139700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6211411 (or 6211404 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 29.

The square root of 621139700 is about 24922.6744150783. The cubic root of 621139700 is about 853.2240647171.

The spelling of 621139700 in words is "six hundred twenty-one million, one hundred thirty-nine thousand, seven hundred".