83636513 has 4 divisors (see below), whose sum is σ = 83694468. Its totient is φ = 83578560.

The previous prime is 83636507. The next prime is 83636521. The reversal of 83636513 is 31563638.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 47720464 + 35916049 = 6908^2 + 5993^2 .

It is a cyclic number.

It is not a de Polignac number, because 83636513 - 2²⁶ = 16527649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83636563) 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, 26756 + ... + 29717.

It is an arithmetic number, because the mean of its divisors is an integer number (20923617).

Almost surely, 2^83636513 is an apocalyptic number.

It is an amenable number.

83636513 is a deficient number, since it is larger than the sum of its proper divisors (57955).

83636513 is a wasteful number, since it uses less digits than its factorization.

83636513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57954.

The product of its digits is 38880, while the sum is 35.

The square root of 83636513 is about 9145.3000497523. The cubic root of 83636513 is about 437.3192949501.

The spelling of 83636513 in words is "eighty-three million, six hundred thirty-six thousand, five hundred thirteen".