90686597 has 2 divisors, whose sum is σ = 90686598. Its totient is φ = 90686596.

The previous prime is 90686581. The next prime is 90686621. The reversal of 90686597 is 79568609.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56942116 + 33744481 = 7546^2 + 5809^2 .

It is an emirp because it is prime and its reverse (79568609) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90686597 - 2⁴ = 90686581 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 (90686507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45343298 + 45343299.

It is an arithmetic number, because the mean of its divisors is an integer number (45343299).

Almost surely, 2^90686597 is an apocalyptic number.

It is an amenable number.

90686597 is a deficient number, since it is larger than the sum of its proper divisors (1).

90686597 is an equidigital number, since it uses as much as digits as its factorization.

90686597 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 816480, while the sum is 50.

The square root of 90686597 is about 9522.9510657149. The cubic root of 90686597 is about 449.2771885787.

The spelling of 90686597 in words is "ninety million, six hundred eighty-six thousand, five hundred ninety-seven".