90871199 has 6 divisors (see below), whose sum is σ = 93898080. Its totient is φ = 87938940.

The previous prime is 90871177. The next prime is 90871217. The reversal of 90871199 is 99117809.

It is not a de Polignac number, because 90871199 - 2²⁴ = 74093983 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 (90871399) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 46319 + ... + 48240.

It is an arithmetic number, because the mean of its divisors is an integer number (15649680).

Almost surely, 2^90871199 is an apocalyptic number.

90871199 is a deficient number, since it is larger than the sum of its proper divisors (3026881).

90871199 is an equidigital number, since it uses as much as digits as its factorization.

90871199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94621 (or 94590 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 44.

The square root of 90871199 is about 9532.6386168783. The cubic root of 90871199 is about 449.5818321090.

The spelling of 90871199 in words is "ninety million, eight hundred seventy-one thousand, one hundred ninety-nine".