90899111 has 4 divisors (see below), whose sum is σ = 90923352. Its totient is φ = 90874872.

The previous prime is 90899063. The next prime is 90899113. The reversal of 90899111 is 11199809.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90899111 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 (90899113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5165 + ... + 14438.

It is an arithmetic number, because the mean of its divisors is an integer number (22730838).

Almost surely, 2^90899111 is an apocalyptic number.

90899111 is a deficient number, since it is larger than the sum of its proper divisors (24241).

90899111 is a wasteful number, since it uses less digits than its factorization.

90899111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24240.

The product of its (nonzero) digits is 5832, while the sum is 38.

The square root of 90899111 is about 9534.1025272440. The cubic root of 90899111 is about 449.6278585861.

The spelling of 90899111 in words is "ninety million, eight hundred ninety-nine thousand, one hundred eleven".