109161906 has 24 divisors (see below), whose sum is σ = 253969200. Its totient is φ = 31189032.

The previous prime is 109161901. The next prime is 109161917. The reversal of 109161906 is 609161901.

It is not an unprimeable number, because it can be changed into a prime (109161901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 185356 + ... + 185943.

It is an arithmetic number, because the mean of its divisors is an integer number (10582050).

Almost surely, 2^109161906 is an apocalyptic number.

109161906 is an abundant number, since it is smaller than the sum of its proper divisors (144807294).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

109161906 is a wasteful number, since it uses less digits than its factorization.

109161906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371318 (or 371311 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 33.

The square root of 109161906 is about 10448.0575228126. The cubic root of 109161906 is about 477.9220153701.

The spelling of 109161906 in words is "one hundred nine million, one hundred sixty-one thousand, nine hundred six".