90899 has 4 divisors (see below), whose sum is σ = 96264. Its totient is φ = 85536.

The previous prime is 90887. The next prime is 90901. The reversal of 90899 is 99809.

90899 is nontrivially palindromic in base 11.

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-90899 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (90199) 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, 2657 + ... + 2690.

It is an arithmetic number, because the mean of its divisors is an integer number (24066).

2⁹⁰⁸⁹⁹ is an apocalyptic number.

90899 is a deficient number, since it is larger than the sum of its proper divisors (5365).

90899 is a wasteful number, since it uses less digits than its factorization.

90899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5364.

The product of its (nonzero) digits is 5832, while the sum is 35.

The square root of 90899 is about 301.4946102337. The cubic root of 90899 is about 44.9627675567.

It can be divided in two parts, 90 and 899, that added together give a palindrome (989).

The spelling of 90899 in words is "ninety thousand, eight hundred ninety-nine".