15791 has 2 divisors, whose sum is σ = 15792. Its totient is φ = 15790.

The previous prime is 15787. The next prime is 15797. The reversal of 15791 is 19751.

It is a weak prime.

It is an emirp because it is prime and its reverse (19751) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15791 - 2² = 15787 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15797) 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, 7895 + 7896.

It is an arithmetic number, because the mean of its divisors is an integer number (7896).

2¹⁵⁷⁹¹ is an apocalyptic number.

15791 is a deficient number, since it is larger than the sum of its proper divisors (1).

15791 is an equidigital number, since it uses as much as digits as its factorization.

15791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 315, while the sum is 23.

The square root of 15791 is about 125.6622457224. The cubic root of 15791 is about 25.0882216448.

The spelling of 15791 in words is "fifteen thousand, seven hundred ninety-one".