39983 has 2 divisors, whose sum is σ = 39984. Its totient is φ = 39982.

The previous prime is 39979. The next prime is 39989. The reversal of 39983 is 38993.

It is a weak prime.

It is an emirp because it is prime and its reverse (38993) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39983 - 2² = 39979 is a prime.

It is a Sophie Germain prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19991 + 19992.

It is an arithmetic number, because the mean of its divisors is an integer number (19992).

2³⁹⁹⁸³ is an apocalyptic number.

39983 is a deficient number, since it is larger than the sum of its proper divisors (1).

39983 is an equidigital number, since it uses as much as digits as its factorization.

39983 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5832, while the sum is 32.

The square root of 39983 is about 199.9574954834. The cubic root of 39983 is about 34.1946733152.

Subtracting from 39983 its reverse (38993), we obtain a triangular number (990 = T₄₄).

The spelling of 39983 in words is "thirty-nine thousand, nine hundred eighty-three".