90565199 has 2 divisors, whose sum is σ = 90565200. Its totient is φ = 90565198.

The previous prime is 90565141. The next prime is 90565217. The reversal of 90565199 is 99156509.

It is a strong prime.

It is an emirp because it is prime and its reverse (99156509) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90565199 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90565109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45282599 + 45282600.

It is an arithmetic number, because the mean of its divisors is an integer number (45282600).

Almost surely, 2^90565199 is an apocalyptic number.

90565199 is a deficient number, since it is larger than the sum of its proper divisors (1).

90565199 is an equidigital number, since it uses as much as digits as its factorization.

90565199 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 109350, while the sum is 44.

The square root of 90565199 is about 9516.5749616130. The cubic root of 90565199 is about 449.0766234478.

The spelling of 90565199 in words is "ninety million, five hundred sixty-five thousand, one hundred ninety-nine".