90761513309 has 2 divisors, whose sum is σ = 90761513310. Its totient is φ = 90761513308.

The previous prime is 90761513303. The next prime is 90761513357. The reversal of 90761513309 is 90331516709.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 89574504100 + 1187009209 = 299290^2 + 34453^2 .

It is a cyclic number.

It is not a de Polignac number, because 90761513309 - 2⁸ = 90761513053 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 90761513309.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90761513303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45380756654 + 45380756655.

It is an arithmetic number, because the mean of its divisors is an integer number (45380756655).

Almost surely, 2^90761513309 is an apocalyptic number.

It is an amenable number.

90761513309 is a deficient number, since it is larger than the sum of its proper divisors (1).

90761513309 is an equidigital number, since it uses as much as digits as its factorization.

90761513309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 153090, while the sum is 44.

The spelling of 90761513309 in words is "ninety billion, seven hundred sixty-one million, five hundred thirteen thousand, three hundred nine".