90772589 has 2 divisors, whose sum is σ = 90772590. Its totient is φ = 90772588.

The previous prime is 90772567. The next prime is 90772597. The reversal of 90772589 is 98527709.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76650025 + 14122564 = 8755^2 + 3758^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90772589 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90772529) 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, 45386294 + 45386295.

It is an arithmetic number, because the mean of its divisors is an integer number (45386295).

Almost surely, 2^90772589 is an apocalyptic number.

It is an amenable number.

90772589 is a deficient number, since it is larger than the sum of its proper divisors (1).

90772589 is an equidigital number, since it uses as much as digits as its factorization.

90772589 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 317520, while the sum is 47.

The square root of 90772589 is about 9527.4649828798. The cubic root of 90772589 is about 449.4191501632.

The spelling of 90772589 in words is "ninety million, seven hundred seventy-two thousand, five hundred eighty-nine".