39791 has 2 divisors, whose sum is σ = 39792. Its totient is φ = 39790.

The previous prime is 39779. The next prime is 39799. The reversal of 39791 is 19793.

It is a strong prime.

It is an emirp because it is prime and its reverse (19793) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39791 - 2⁶ = 39727 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 (39799) 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, 19895 + 19896.

It is an arithmetic number, because the mean of its divisors is an integer number (19896).

2³⁹⁷⁹¹ is an apocalyptic number.

39791 is a deficient number, since it is larger than the sum of its proper divisors (1).

39791 is an equidigital number, since it uses as much as digits as its factorization.

39791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1701, while the sum is 29.

The square root of 39791 is about 199.4768156955. The cubic root of 39791 is about 34.1398507283.

The spelling of 39791 in words is "thirty-nine thousand, seven hundred ninety-one".