99312113 has 6 divisors (see below), whose sum is σ = 105197526. Its totient is φ = 93431552.

The previous prime is 99312097. The next prime is 99312121. The reversal of 99312113 is 31121399.

It can be written as a sum of positive squares in 3 ways, for example, as 83685904 + 15626209 = 9148^2 + 3953^2 .

It is not a de Polignac number, because 99312113 - 2⁴ = 99312097 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (99312133) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 39881 + ... + 42297.

It is an arithmetic number, because the mean of its divisors is an integer number (17532921).

Almost surely, 2^99312113 is an apocalyptic number.

It is an amenable number.

99312113 is a deficient number, since it is larger than the sum of its proper divisors (5885413).

99312113 is an frugal number, since it uses more digits than its factorization.

99312113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4851 (or 2434 counting only the distinct ones).

The product of its digits is 1458, while the sum is 29.

The square root of 99312113 is about 9965.5462971179. The cubic root of 99312113 is about 463.0921374011.

The spelling of 99312113 in words is "ninety-nine million, three hundred twelve thousand, one hundred thirteen".