83613685 has 4 divisors (see below), whose sum is σ = 100336428. Its totient is φ = 66890944.

The previous prime is 83613659. The next prime is 83613697. The reversal of 83613685 is 58631638.

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 63345681 + 20268004 = 7959^2 + 4502^2 .

It is a cyclic number.

It is not a de Polignac number, because 83613685 - 2⁵ = 83613653 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8361364 + ... + 8361373.

It is an arithmetic number, because the mean of its divisors is an integer number (25084107).

Almost surely, 2^83613685 is an apocalyptic number.

It is an amenable number.

83613685 is a deficient number, since it is larger than the sum of its proper divisors (16722743).

83613685 is a wasteful number, since it uses less digits than its factorization.

83613685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16722742.

The product of its digits is 103680, while the sum is 40.

The square root of 83613685 is about 9144.0518918038. The cubic root of 83613685 is about 437.2795035842.

The spelling of 83613685 in words is "eighty-three million, six hundred thirteen thousand, six hundred eighty-five".