2109623165 has 16 divisors (see below), whose sum is σ = 2727381888. Its totient is φ = 1557247296.

The previous prime is 2109623161. The next prime is 2109623179. The reversal of 2109623165 is 5613269012.

It is a cyclic number.

It is not a de Polignac number, because 2109623165 - 2² = 2109623161 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2109623161) 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, 211112 + ... + 220878.

It is an arithmetic number, because the mean of its divisors is an integer number (170461368).

Almost surely, 2^2109623165 is an apocalyptic number.

It is an amenable number.

2109623165 is a deficient number, since it is larger than the sum of its proper divisors (617758723).

2109623165 is a wasteful number, since it uses less digits than its factorization.

2109623165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13108.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 2109623165 is about 45930.6342760472. The cubic root of 2109623165 is about 1282.5322521012.

The spelling of 2109623165 in words is "two billion, one hundred nine million, six hundred twenty-three thousand, one hundred sixty-five".