89517509 has 2 divisors, whose sum is σ = 89517510. Its totient is φ = 89517508.

The previous prime is 89517503. The next prime is 89517557. The reversal of 89517509 is 90571598.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56776225 + 32741284 = 7535^2 + 5722^2 .

It is a cyclic number.

It is not a de Polignac number, because 89517509 - 2²⁴ = 72740293 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 89517509.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89517503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44758754 + 44758755.

It is an arithmetic number, because the mean of its divisors is an integer number (44758755).

Almost surely, 2^89517509 is an apocalyptic number.

It is an amenable number.

89517509 is a deficient number, since it is larger than the sum of its proper divisors (1).

89517509 is an equidigital number, since it uses as much as digits as its factorization.

89517509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 113400, while the sum is 44.

The square root of 89517509 is about 9461.3692983627. The cubic root of 89517509 is about 447.3382106063.

The spelling of 89517509 in words is "eighty-nine million, five hundred seventeen thousand, five hundred nine".