99117961 has 8 divisors (see below), whose sum is σ = 100000800. Its totient is φ = 98239488.

The previous prime is 99117959. The next prime is 99117983. The reversal of 99117961 is 16971199.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 99117961 - 2¹ = 99117959 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99117761) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57490 + ... + 59188.

It is an arithmetic number, because the mean of its divisors is an integer number (12500100).

Almost surely, 2^99117961 is an apocalyptic number.

It is an amenable number.

99117961 is a deficient number, since it is larger than the sum of its proper divisors (882839).

99117961 is a wasteful number, since it uses less digits than its factorization.

99117961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2183.

The product of its digits is 30618, while the sum is 43.

The square root of 99117961 is about 9955.8003696338. The cubic root of 99117961 is about 462.7901637672.

The spelling of 99117961 in words is "ninety-nine million, one hundred seventeen thousand, nine hundred sixty-one".