99117511 has 4 divisors (see below), whose sum is σ = 103426992. Its totient is φ = 94808032.

The previous prime is 99117503. The next prime is 99117517. The reversal of 99117511 is 11571199.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 99117511 - 2³ = 99117503 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99117517) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2154706 + ... + 2154751.

It is an arithmetic number, because the mean of its divisors is an integer number (25856748).

Almost surely, 2^99117511 is an apocalyptic number.

99117511 is a deficient number, since it is larger than the sum of its proper divisors (4309481).

99117511 is a wasteful number, since it uses less digits than its factorization.

99117511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4309480.

The product of its digits is 2835, while the sum is 34.

The square root of 99117511 is about 9955.7777697174. Note that the first 4 decimals coincide. The cubic root of 99117511 is about 462.7894634034.

The spelling of 99117511 in words is "ninety-nine million, one hundred seventeen thousand, five hundred eleven".