83986 has 12 divisors (see below), whose sum is σ = 146718. Its totient is φ = 35952.

The previous prime is 83983. The next prime is 83987. The reversal of 83986 is 68938.

It can be written as a sum of positive squares in only one way, i.e., 53361 + 30625 = 231^2 + 175^2 .

It is not an unprimeable number, because it can be changed into a prime (83983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 331 + ... + 526.

2⁸³⁹⁸⁶ is an apocalyptic number.

83986 is a deficient number, since it is larger than the sum of its proper divisors (62732).

83986 is a wasteful number, since it uses less digits than its factorization.

83986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 873 (or 866 counting only the distinct ones).

The product of its digits is 10368, while the sum is 34.

The square root of 83986 is about 289.8033816228. The cubic root of 83986 is about 43.7927581975.

The spelling of 83986 in words is "eighty-three thousand, nine hundred eighty-six".