90633589 has 2 divisors, whose sum is σ = 90633590. Its totient is φ = 90633588.

The previous prime is 90633581. The next prime is 90633643. The reversal of 90633589 is 98533609.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54272689 + 36360900 = 7367^2 + 6030^2 .

It is a cyclic number.

It is not a de Polignac number, because 90633589 - 2³ = 90633581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90633581) 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, 45316794 + 45316795.

It is an arithmetic number, because the mean of its divisors is an integer number (45316795).

Almost surely, 2^90633589 is an apocalyptic number.

It is an amenable number.

90633589 is a deficient number, since it is larger than the sum of its proper divisors (1).

90633589 is an equidigital number, since it uses as much as digits as its factorization.

90633589 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 174960, while the sum is 43.

The square root of 90633589 is about 9520.1674880225. The cubic root of 90633589 is about 449.1896345642.

The spelling of 90633589 in words is "ninety million, six hundred thirty-three thousand, five hundred eighty-nine".