90897593 has 2 divisors, whose sum is σ = 90897594. Its totient is φ = 90897592.

The previous prime is 90897581. The next prime is 90897601. The reversal of 90897593 is 39579809.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57350329 + 33547264 = 7573^2 + 5792^2 .

It is a cyclic number.

It is not a de Polignac number, because 90897593 - 2⁶ = 90897529 is a prime.

It is not a weakly prime, because it can be changed into another prime (90897553) 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, 45448796 + 45448797.

It is an arithmetic number, because the mean of its divisors is an integer number (45448797).

Almost surely, 2^90897593 is an apocalyptic number.

It is an amenable number.

90897593 is a deficient number, since it is larger than the sum of its proper divisors (1).

90897593 is an equidigital number, since it uses as much as digits as its factorization.

90897593 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 612360, while the sum is 50.

The square root of 90897593 is about 9534.0229179502. The cubic root of 90897593 is about 449.6253556688.

The spelling of 90897593 in words is "ninety million, eight hundred ninety-seven thousand, five hundred ninety-three".