99831379 has 4 divisors (see below), whose sum is σ = 100057176. Its totient is φ = 99605584.

The previous prime is 99831371. The next prime is 99831397. The reversal of 99831379 is 97313899.

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 99831379 - 2³ = 99831371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99831371) 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, 112234 + ... + 113119.

It is an arithmetic number, because the mean of its divisors is an integer number (25014294).

Almost surely, 2^99831379 is an apocalyptic number.

99831379 is a deficient number, since it is larger than the sum of its proper divisors (225797).

99831379 is a wasteful number, since it uses less digits than its factorization.

99831379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225796.

The product of its digits is 367416, while the sum is 49.

The square root of 99831379 is about 9991.5653928701. The cubic root of 99831379 is about 463.8978468019.

The spelling of 99831379 in words is "ninety-nine million, eight hundred thirty-one thousand, three hundred seventy-nine".