107991189 has 12 divisors (see below), whose sum is σ = 159615456. Its totient is φ = 70319592.

The previous prime is 107991161. The next prime is 107991199. The reversal of 107991189 is 981199701.

It is not a de Polignac number, because 107991189 - 2⁸ = 107990933 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (107991139) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 139137 + ... + 139910.

It is an arithmetic number, because the mean of its divisors is an integer number (13301288).

Almost surely, 2^107991189 is an apocalyptic number.

It is an amenable number.

107991189 is a deficient number, since it is larger than the sum of its proper divisors (51624267).

107991189 is a wasteful number, since it uses less digits than its factorization.

107991189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279096 (or 279093 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 45.

The square root of 107991189 is about 10391.8809173316. The cubic root of 107991189 is about 476.2073646913.

The spelling of 107991189 in words is "one hundred seven million, nine hundred ninety-one thousand, one hundred eighty-nine".