109161899 has 16 divisors (see below), whose sum is σ = 136478976. Its totient is φ = 84823200.

The previous prime is 109161889. The next prime is 109161901. The reversal of 109161899 is 998161901.

It is a de Polignac number, because none of the positive numbers 2^k-109161899 is a prime.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (109161809) 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, 28784 + ... + 32354.

It is an arithmetic number, because the mean of its divisors is an integer number (8529936).

Almost surely, 2^109161899 is an apocalyptic number.

109161899 is a deficient number, since it is larger than the sum of its proper divisors (27317077).

109161899 is a wasteful number, since it uses less digits than its factorization.

109161899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3986.

The product of its (nonzero) digits is 34992, while the sum is 44.

The square root of 109161899 is about 10448.0571878220. The cubic root of 109161899 is about 477.9220051545.

The spelling of 109161899 in words is "one hundred nine million, one hundred sixty-one thousand, eight hundred ninety-nine".