99112665391 has 4 divisors (see below), whose sum is σ = 99115593192. Its totient is φ = 99109737592.

The previous prime is 99112665367. The next prime is 99112665433. The reversal of 99112665391 is 19356621199.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19356621199 = 61 ⋅317321659.

It is a cyclic number.

It is not a de Polignac number, because 99112665391 - 2⁵ = 99112665359 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 (99112165391) 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, 1412521 + ... + 1481026.

It is an arithmetic number, because the mean of its divisors is an integer number (24778898298).

Almost surely, 2^99112665391 is an apocalyptic number.

99112665391 is a deficient number, since it is larger than the sum of its proper divisors (2927801).

99112665391 is a wasteful number, since it uses less digits than its factorization.

99112665391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2927800.

The product of its digits is 787320, while the sum is 52.

The spelling of 99112665391 in words is "ninety-nine billion, one hundred twelve million, six hundred sixty-five thousand, three hundred ninety-one".