89636513 has 4 divisors (see below), whose sum is σ = 90281520. Its totient is φ = 88991508.

The previous prime is 89636507. The next prime is 89636527. The reversal of 89636513 is 31563698.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31563698 = 2 ⋅15781849.

It is a cyclic number.

It is not a de Polignac number, because 89636513 - 2¹⁰ = 89635489 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (89636213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 322295 + ... + 322572.

It is an arithmetic number, because the mean of its divisors is an integer number (22570380).

Almost surely, 2^89636513 is an apocalyptic number.

It is an amenable number.

89636513 is a deficient number, since it is larger than the sum of its proper divisors (645007).

89636513 is a wasteful number, since it uses less digits than its factorization.

89636513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 645006.

The product of its digits is 116640, while the sum is 41.

The square root of 89636513 is about 9467.6561513397. The cubic root of 89636513 is about 447.5363523416.

The spelling of 89636513 in words is "eighty-nine million, six hundred thirty-six thousand, five hundred thirteen".