108720189 has 12 divisors (see below), whose sum is σ = 157142076. Its totient is φ = 72433152.

The previous prime is 108720179. The next prime is 108720191. The reversal of 108720189 is 981027801.

It can be written as a sum of positive squares in 2 ways, for example, as 20548089 + 88172100 = 4533^2 + 9390^2 .

It is not a de Polignac number, because 108720189 - 2²⁵ = 75165757 is a prime.

It is a super-3 number, since 3×108720189³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (108720169) 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, 16159 + ... + 21875.

It is an arithmetic number, because the mean of its divisors is an integer number (13095173).

Almost surely, 2^108720189 is an apocalyptic number.

It is an amenable number.

108720189 is a deficient number, since it is larger than the sum of its proper divisors (48421887).

108720189 is a wasteful number, since it uses less digits than its factorization.

108720189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7836 (or 7833 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 36.

The square root of 108720189 is about 10426.8973812923. The cubic root of 108720189 is about 477.2765164919.

The spelling of 108720189 in words is "one hundred eight million, seven hundred twenty thousand, one hundred eighty-nine".