109939187 has 8 divisors (see below), whose sum is σ = 122533200. Its totient is φ = 98025984.

The previous prime is 109939177. The next prime is 109939231. The reversal of 109939187 is 781939901.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 109939187 - 2⁴ = 109939171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (109939177) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 169862 + ... + 170507.

It is an arithmetic number, because the mean of its divisors is an integer number (15316650).

Almost surely, 2^109939187 is an apocalyptic number.

109939187 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

109939187 is a deficient number, since it is larger than the sum of its proper divisors (12594013).

109939187 is a wasteful number, since it uses less digits than its factorization.

109939187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340405.

The product of its (nonzero) digits is 122472, while the sum is 47.

The square root of 109939187 is about 10485.1889348738. The cubic root of 109939187 is about 479.0536722734.

The spelling of 109939187 in words is "one hundred nine million, nine hundred thirty-nine thousand, one hundred eighty-seven".