90868199 has 4 divisors (see below), whose sum is σ = 91889280. Its totient is φ = 89847120.

The previous prime is 90868163. The next prime is 90868229. The reversal of 90868199 is 99186809.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99186809 = 1777 ⋅55817.

It is a cyclic number.

It is not a de Polignac number, because 90868199 - 2⁸ = 90867943 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 (90868499) 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, 510407 + ... + 510584.

It is an arithmetic number, because the mean of its divisors is an integer number (22972320).

Almost surely, 2^90868199 is an apocalyptic number.

90868199 is a deficient number, since it is larger than the sum of its proper divisors (1021081).

90868199 is a wasteful number, since it uses less digits than its factorization.

90868199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1021080.

The product of its (nonzero) digits is 279936, while the sum is 50.

The square root of 90868199 is about 9532.4812614555. The cubic root of 90868199 is about 449.5768845922.

The spelling of 90868199 in words is "ninety million, eight hundred sixty-eight thousand, one hundred ninety-nine".