78797 has 2 divisors, whose sum is σ = 78798. Its totient is φ = 78796.

The previous prime is 78791. The next prime is 78803. The reversal of 78797 is 79787.

It is a balanced prime because it is at equal distance from previous prime (78791) and next prime (78803).

It can be written as a sum of positive squares in only one way, i.e., 75076 + 3721 = 274^2 + 61^2 .

It is a cyclic number.

It is not a de Polignac number, because 78797 - 2⁴ = 78781 is a prime.

It is a Chen prime.

It is an Ulam number.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 78797.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39398 + 39399.

It is an arithmetic number, because the mean of its divisors is an integer number (39399).

2⁷⁸⁷⁹⁷ is an apocalyptic number.

It is an amenable number.

78797 is a deficient number, since it is larger than the sum of its proper divisors (1).

78797 is an equidigital number, since it uses as much as digits as its factorization.

78797 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24696, while the sum is 38.

The square root of 78797 is about 280.7080333728. The cubic root of 78797 is about 42.8716199768.

Subtracting 78797 from its reverse (79787), we obtain a triangular number (990 = T₄₄).

The spelling of 78797 in words is "seventy-eight thousand, seven hundred ninety-seven".