39959 has 4 divisors (see below), whose sum is σ = 41280. Its totient is φ = 38640.

The previous prime is 39953. The next prime is 39971. The reversal of 39959 is 95993.

39959 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 95993 = 59 ⋅1627.

It is a cyclic number.

It is not a de Polignac number, because 39959 - 2⁸ = 39703 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 39959.

It is not an unprimeable number, because it can be changed into a prime (39953) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 614 + ... + 675.

It is an arithmetic number, because the mean of its divisors is an integer number (10320).

2³⁹⁹⁵⁹ is an apocalyptic number.

39959 is a deficient number, since it is larger than the sum of its proper divisors (1321).

39959 is a wasteful number, since it uses less digits than its factorization.

39959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1320.

The product of its digits is 10935, while the sum is 35.

The square root of 39959 is about 199.8974737209. The cubic root of 39959 is about 34.1878301033.

It can be divided in two parts, 3995 and 9, that added together give a palindrome (4004).

The spelling of 39959 in words is "thirty-nine thousand, nine hundred fifty-nine".