90565259 has 2 divisors, whose sum is σ = 90565260. Its totient is φ = 90565258.

The previous prime is 90565249. The next prime is 90565303. The reversal of 90565259 is 95256509.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 90565259 - 2²⁰ = 89516683 is a prime.

It is a super-2 number, since 2×90565259² = 16404132275474162, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (90565249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45282629 + 45282630.

It is an arithmetic number, because the mean of its divisors is an integer number (45282630).

Almost surely, 2^90565259 is an apocalyptic number.

90565259 is a deficient number, since it is larger than the sum of its proper divisors (1).

90565259 is an equidigital number, since it uses as much as digits as its factorization.

90565259 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 121500, while the sum is 41.

The square root of 90565259 is about 9516.5781140072. The cubic root of 90565259 is about 449.0767226198.

The spelling of 90565259 in words is "ninety million, five hundred sixty-five thousand, two hundred fifty-nine".