90568589 has 2 divisors, whose sum is σ = 90568590. Its totient is φ = 90568588.

The previous prime is 90568567. The next prime is 90568601. The reversal of 90568589 is 98586509.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85470025 + 5098564 = 9245^2 + 2258^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90568589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90568789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45284294 + 45284295.

It is an arithmetic number, because the mean of its divisors is an integer number (45284295).

Almost surely, 2^90568589 is an apocalyptic number.

It is an amenable number.

90568589 is a deficient number, since it is larger than the sum of its proper divisors (1).

90568589 is an equidigital number, since it uses as much as digits as its factorization.

90568589 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 777600, while the sum is 50.

The square root of 90568589 is about 9516.7530702441. The cubic root of 90568589 is about 449.0822265962.

The spelling of 90568589 in words is "ninety million, five hundred sixty-eight thousand, five hundred eighty-nine".