99408889 has 4 divisors (see below), whose sum is σ = 99622224. Its totient is φ = 99195556.

The previous prime is 99408871. The next prime is 99408919. The reversal of 99408889 is 98880499.

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.

It is a cyclic number.

It is not a de Polignac number, because 99408889 - 2¹⁹ = 98884601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99406889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105967 + ... + 106900.

It is an arithmetic number, because the mean of its divisors is an integer number (24905556).

Almost surely, 2^99408889 is an apocalyptic number.

It is an amenable number.

99408889 is a deficient number, since it is larger than the sum of its proper divisors (213335).

99408889 is a wasteful number, since it uses less digits than its factorization.

99408889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213334.

The product of its (nonzero) digits is 1492992, while the sum is 55.

The square root of 99408889 is about 9970.4006439059. The cubic root of 99408889 is about 463.2425106501.

The spelling of 99408889 in words is "ninety-nine million, four hundred eight thousand, eight hundred eighty-nine".