83813185 has 4 divisors (see below), whose sum is σ = 100575828. Its totient is φ = 67050544.

The previous prime is 83813159. The next prime is 83813201. The reversal of 83813185 is 58131838.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58131838 = 2 ⋅29065919.

It can be written as a sum of positive squares in 2 ways, for example, as 10608049 + 73205136 = 3257^2 + 8556^2 .

It is a cyclic number.

It is not a de Polignac number, because 83813185 - 2⁵ = 83813153 is a prime.

It is a Duffinian 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, 8381314 + ... + 8381323.

It is an arithmetic number, because the mean of its divisors is an integer number (25143957).

Almost surely, 2^83813185 is an apocalyptic number.

It is an amenable number.

83813185 is a deficient number, since it is larger than the sum of its proper divisors (16762643).

83813185 is a wasteful number, since it uses less digits than its factorization.

83813185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16762642.

The product of its digits is 23040, while the sum is 37.

The square root of 83813185 is about 9154.9541233149. The cubic root of 83813185 is about 437.6270063917.

The spelling of 83813185 in words is "eighty-three million, eight hundred thirteen thousand, one hundred eighty-five".