1165172099 has 16 divisors (see below), whose sum is σ = 1440035520. Its totient is φ = 918051840.

The previous prime is 1165172081. The next prime is 1165172117. The reversal of 1165172099 is 9902715611.

It is an interprime number because it is at equal distance from previous prime (1165172081) and next prime (1165172117).

It is a cyclic number.

It is not a de Polignac number, because 1165172099 - 2²⁰ = 1164123523 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1165172599) 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, 4634 + ... + 48495.

It is an arithmetic number, because the mean of its divisors is an integer number (90002220).

Almost surely, 2^1165172099 is an apocalyptic number.

1165172099 is a deficient number, since it is larger than the sum of its proper divisors (274863421).

1165172099 is a wasteful number, since it uses less digits than its factorization.

1165172099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53390.

The product of its (nonzero) digits is 34020, while the sum is 41.

The square root of 1165172099 is about 34134.6173114626. The cubic root of 1165172099 is about 1052.2768729019.

The spelling of 1165172099 in words is "one billion, one hundred sixty-five million, one hundred seventy-two thousand, ninety-nine".