109939185 has 12 divisors (see below), whose sum is σ = 190561332. Its totient is φ = 58634208.

The previous prime is 109939177. The next prime is 109939231. The reversal of 109939185 is 581939901.

It can be written as a sum of positive squares in 2 ways, for example, as 84658401 + 25280784 = 9201^2 + 5028^2 .

It is not a de Polignac number, because 109939185 - 2³ = 109939177 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 2443093 = 109939185 / (1 + 0 + 9 + 9 + 3 + 9 + 1 + 8 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 109939185.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1221502 + ... + 1221591.

It is an arithmetic number, because the mean of its divisors is an integer number (15880111).

Almost surely, 2^109939185 is an apocalyptic number.

109939185 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

109939185 is a deficient number, since it is larger than the sum of its proper divisors (80622147).

109939185 is a wasteful number, since it uses less digits than its factorization.

109939185 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2443104 (or 2443101 counting only the distinct ones).

The product of its (nonzero) digits is 87480, while the sum is 45.

The square root of 109939185 is about 10485.1888395012. The cubic root of 109939185 is about 479.0536693685.

The spelling of 109939185 in words is "one hundred nine million, nine hundred thirty-nine thousand, one hundred eighty-five".