621091132 has 6 divisors (see below), whose sum is σ = 1086909488. Its totient is φ = 310545564.

The previous prime is 621091111. The next prime is 621091189. The reversal of 621091132 is 231190126.

It is a junction number, because it is equal to n+sod(n) for n = 621091097 and 621091106.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77636388 + ... + 77636395.

Almost surely, 2^621091132 is an apocalyptic number.

It is an amenable number.

621091132 is a deficient number, since it is larger than the sum of its proper divisors (465818356).

621091132 is a wasteful number, since it uses less digits than its factorization.

621091132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155272787 (or 155272785 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 621091132 is about 24921.7000222697. The cubic root of 621091132 is about 853.2018257766.

The spelling of 621091132 in words is "six hundred twenty-one million, ninety-one thousand, one hundred thirty-two".