90809590199 has 2 divisors, whose sum is σ = 90809590200. Its totient is φ = 90809590198.

The previous prime is 90809590171. The next prime is 90809590211. The reversal of 90809590199 is 99109590809.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90809590199 is a prime.

It is a super-2 number, since 2×90809590199² (a number of 23 digits) contains 22 as substring.

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 (90809590099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45404795099 + 45404795100.

It is an arithmetic number, because the mean of its divisors is an integer number (45404795100).

Almost surely, 2^90809590199 is an apocalyptic number.

90809590199 is a deficient number, since it is larger than the sum of its proper divisors (1).

90809590199 is an equidigital number, since it uses as much as digits as its factorization.

90809590199 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2361960, while the sum is 59.

The spelling of 90809590199 in words is "ninety billion, eight hundred nine million, five hundred ninety thousand, one hundred ninety-nine".