99918133 has 4 divisors (see below), whose sum is σ = 114192160. Its totient is φ = 85644108.

The previous prime is 99918113. The next prime is 99918149. The reversal of 99918133 is 33181999.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 33181999 = 19 ⋅1746421.

It is a cyclic number.

It is not a de Polignac number, because 99918133 - 2²¹ = 97820981 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 99918133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99918113) 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, 7137003 + ... + 7137016.

It is an arithmetic number, because the mean of its divisors is an integer number (28548040).

Almost surely, 2^99918133 is an apocalyptic number.

It is an amenable number.

99918133 is a deficient number, since it is larger than the sum of its proper divisors (14274027).

99918133 is a wasteful number, since it uses less digits than its factorization.

99918133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14274026.

The product of its digits is 52488, while the sum is 43.

The square root of 99918133 is about 9995.9058118812. The cubic root of 99918133 is about 464.0321844624.

The spelling of 99918133 in words is "ninety-nine million, nine hundred eighteen thousand, one hundred thirty-three".