90508199 has 2 divisors, whose sum is σ = 90508200. Its totient is φ = 90508198.

The previous prime is 90508193. The next prime is 90508207. The reversal of 90508199 is 99180509.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 90508199 - 2⁸ = 90507943 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90508193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45254099 + 45254100.

It is an arithmetic number, because the mean of its divisors is an integer number (45254100).

Almost surely, 2^90508199 is an apocalyptic number.

90508199 is a deficient number, since it is larger than the sum of its proper divisors (1).

90508199 is an equidigital number, since it uses as much as digits as its factorization.

90508199 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 29160, while the sum is 41.

The square root of 90508199 is about 9513.5797153332. The cubic root of 90508199 is about 448.9823902697.

The spelling of 90508199 in words is "ninety million, five hundred eight thousand, one hundred ninety-nine".