33986 has 4 divisors (see below), whose sum is σ = 50982. Its totient is φ = 16992.

The previous prime is 33967. The next prime is 33997. The reversal of 33986 is 68933.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 68933 = 29 ⋅2377.

It can be written as a sum of positive squares in only one way, i.e., 32761 + 1225 = 181^2 + 35^2 .

It is an unprimeable number.

33986 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 as a sum of consecutive naturals, namely, 8495 + ... + 8498.

2³³⁹⁸⁶ is an apocalyptic number.

33986 is a deficient number, since it is larger than the sum of its proper divisors (16996).

33986 is a wasteful number, since it uses less digits than its factorization.

33986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16995.

The product of its digits is 3888, while the sum is 29.

The square root of 33986 is about 184.3529224070. The cubic root of 33986 is about 32.3916708763.

The spelling of 33986 in words is "thirty-three thousand, nine hundred eighty-six".