621689876 has 12 divisors (see below), whose sum is σ = 1088336340. Its totient is φ = 310736640.

The previous prime is 621689869. The next prime is 621689879. The reversal of 621689876 is 678986126.

It can be written as a sum of positive squares in 2 ways, for example, as 603881476 + 17808400 = 24574^2 + 4220^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621689879) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13391 + ... + 37718.

It is an arithmetic number, because the mean of its divisors is an integer number (90694695).

Almost surely, 2^621689876 is an apocalyptic number.

It is an amenable number.

621689876 is a deficient number, since it is larger than the sum of its proper divisors (466646464).

621689876 is a wasteful number, since it uses less digits than its factorization.

621689876 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54154 (or 54152 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 53.

The square root of 621689876 is about 24933.7096317415. The cubic root of 621689876 is about 853.4759054723.

The spelling of 621689876 in words is "six hundred twenty-one million, six hundred eighty-nine thousand, eight hundred seventy-six".