109639090 has 32 divisors (see below), whose sum is σ = 215732160. Its totient is φ = 39787200.

The previous prime is 109639087. The next prime is 109639097. The reversal of 109639090 is 90936901.

It is not an unprimeable number, because it can be changed into a prime (109639097) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88596 + ... + 89824.

It is an arithmetic number, because the mean of its divisors is an integer number (6741630).

Almost surely, 2^109639090 is an apocalyptic number.

109639090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

109639090 is a deficient number, since it is larger than the sum of its proper divisors (106093070).

109639090 is a wasteful number, since it uses less digits than its factorization.

109639090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2058.

The product of its (nonzero) digits is 13122, while the sum is 37.

The square root of 109639090 is about 10470.8686363644. The cubic root of 109639090 is about 478.6173899360.

It can be divided in two parts, 1096 and 39090, that added together give a triangular number (40186 = T₂₈₃).

The spelling of 109639090 in words is "one hundred nine million, six hundred thirty-nine thousand, ninety".