99890879 has 8 divisors (see below), whose sum is σ = 109695360. Its totient is φ = 90207000.

The previous prime is 99890873. The next prime is 99890887. The reversal of 99890879 is 97809899.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99890879 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 (99890873) 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, 28409 + ... + 31730.

It is an arithmetic number, because the mean of its divisors is an integer number (13711920).

Almost surely, 2^99890879 is an apocalyptic number.

99890879 is a deficient number, since it is larger than the sum of its proper divisors (9804481).

99890879 is a wasteful number, since it uses less digits than its factorization.

99890879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60301.

The product of its (nonzero) digits is 2939328, while the sum is 59.

The square root of 99890879 is about 9994.5424607633. The cubic root of 99890879 is about 463.9899903087.

The spelling of 99890879 in words is "ninety-nine million, eight hundred ninety thousand, eight hundred seventy-nine".