83985565 has 8 divisors (see below), whose sum is σ = 101311488. Its totient is φ = 66835920.

The previous prime is 83985557. The next prime is 83985571. The reversal of 83985565 is 56558938.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 83985565 - 2³ = 83985557 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 43017 + ... + 44926.

It is an arithmetic number, because the mean of its divisors is an integer number (12663936).

Almost surely, 2^83985565 is an apocalyptic number.

It is an amenable number.

83985565 is a deficient number, since it is larger than the sum of its proper divisors (17325923).

83985565 is a wasteful number, since it uses less digits than its factorization.

83985565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88139.

The product of its digits is 1296000, while the sum is 49.

The square root of 83985565 is about 9164.3638622656. The cubic root of 83985565 is about 437.9268259013.

The spelling of 83985565 in words is "eighty-three million, nine hundred eighty-five thousand, five hundred sixty-five".