39799 has 2 divisors, whose sum is σ = 39800. Its totient is φ = 39798.

The previous prime is 39791. The next prime is 39821. The reversal of 39799 is 99793.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (99793) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39799 - 2³ = 39791 is a prime.

It is a Chen prime.

It is a plaindrome in base 8.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19899 + 19900.

It is an arithmetic number, because the mean of its divisors is an integer number (19900).

2³⁹⁷⁹⁹ is an apocalyptic number.

39799 is a deficient number, since it is larger than the sum of its proper divisors (1).

39799 is an equidigital number, since it uses as much as digits as its factorization.

39799 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15309, while the sum is 37.

The square root of 39799 is about 199.4968671433. The cubic root of 39799 is about 34.1421385195.

It can be divided in two parts, 397 and 99, that added together give a triangular number (496 = T₃₁).

The spelling of 39799 in words is "thirty-nine thousand, seven hundred ninety-nine".