15797 has 2 divisors, whose sum is σ = 15798. Its totient is φ = 15796.

The previous prime is 15791. The next prime is 15803. The reversal of 15797 is 79751.

It is a balanced prime because it is at equal distance from previous prime (15791) and next prime (15803).

It can be written as a sum of positive squares in only one way, i.e., 14641 + 1156 = 121^2 + 34^2 .

It is a cyclic number.

It is not a de Polignac number, because 15797 - 2⁶ = 15733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7898 + 7899.

It is an arithmetic number, because the mean of its divisors is an integer number (7899).

2¹⁵⁷⁹⁷ is an apocalyptic number.

It is an amenable number.

15797 is a deficient number, since it is larger than the sum of its proper divisors (1).

15797 is an equidigital number, since it uses as much as digits as its factorization.

15797 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2205, while the sum is 29.

The square root of 15797 is about 125.6861169740. The cubic root of 15797 is about 25.0913987767.

The spelling of 15797 in words is "fifteen thousand, seven hundred ninety-seven".