89910999 has 16 divisors (see below), whose sum is σ = 136803040. Its totient is φ = 58320000.

The previous prime is 89910971. The next prime is 89911001. The reversal of 89910999 is 99901998.

It is not a de Polignac number, because 89910999 - 2⁷ = 89910871 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 (89910959) 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 15 ways as a sum of consecutive naturals, for example, 44002 + ... + 45999.

It is an arithmetic number, because the mean of its divisors is an integer number (8550190).

Almost surely, 2^89910999 is an apocalyptic number.

89910999 is a deficient number, since it is larger than the sum of its proper divisors (46892041).

89910999 is a wasteful number, since it uses less digits than its factorization.

89910999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90047 (or 90041 counting only the distinct ones).

The product of its (nonzero) digits is 472392, while the sum is 54.

The square root of 89910999 is about 9482.1410556899. The cubic root of 89910999 is about 447.9927038964.

Subtracting 89910999 from its reverse (99901998), we obtain a palindrome (9990999).

It can be divided in two parts, 89910 and 999, that added together give a palindrome (90909).

The spelling of 89910999 in words is "eighty-nine million, nine hundred ten thousand, nine hundred ninety-nine".