109621986 has 16 divisors (see below), whose sum is σ = 219518400. Its totient is φ = 36494928.

The previous prime is 109621957. The next prime is 109621997. The reversal of 109621986 is 689126901.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6046 + ... + 15993.

It is an arithmetic number, because the mean of its divisors is an integer number (13719900).

Almost surely, 2^109621986 is an apocalyptic number.

109621986 is an abundant number, since it is smaller than the sum of its proper divisors (109896414).

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

109621986 is a wasteful number, since it uses less digits than its factorization.

109621986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22873.

The product of its (nonzero) digits is 46656, while the sum is 42.

The square root of 109621986 is about 10470.0518623357. The cubic root of 109621986 is about 478.5925000980.

The spelling of 109621986 in words is "one hundred nine million, six hundred twenty-one thousand, nine hundred eighty-six".