109939986 has 96 divisors (see below), whose sum is σ = 281277360. Its totient is φ = 30707712.

The previous prime is 109939979. The next prime is 109939993. The reversal of 109939986 is 689939901.

It is an interprime number because it is at equal distance from previous prime (109939979) and next prime (109939993).

It can be written as a sum of positive squares in 8 ways, for example, as 46498761 + 63441225 = 6819^2 + 7965^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 114886 + ... + 115838.

Almost surely, 2^109939986 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 109939986, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (140638680).

109939986 is an abundant number, since it is smaller than the sum of its proper divisors (171337374).

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

109939986 is a wasteful number, since it uses less digits than its factorization.

109939986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1020 (or 1017 counting only the distinct ones).

The product of its (nonzero) digits is 944784, while the sum is 54.

The square root of 109939986 is about 10485.2270361686. The cubic root of 109939986 is about 479.0548328028.

The spelling of 109939986 in words is "one hundred nine million, nine hundred thirty-nine thousand, nine hundred eighty-six".