90875999 has 4 divisors (see below), whose sum is σ = 96221664. Its totient is φ = 85530336.

The previous prime is 90875987. The next prime is 90876007. The reversal of 90875999 is 99957809.

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

It is a cyclic number.

It is not a de Polignac number, because 90875999 - 2¹² = 90871903 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 (90875929) 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, 2672807 + ... + 2672840.

It is an arithmetic number, because the mean of its divisors is an integer number (24055416).

Almost surely, 2^90875999 is an apocalyptic number.

90875999 is a deficient number, since it is larger than the sum of its proper divisors (5345665).

90875999 is a wasteful number, since it uses less digits than its factorization.

90875999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5345664.

The product of its (nonzero) digits is 1837080, while the sum is 56.

The square root of 90875999 is about 9532.8903801523. The cubic root of 90875999 is about 449.5897479093.

The spelling of 90875999 in words is "ninety million, eight hundred seventy-five thousand, nine hundred ninety-nine".