79997 has 2 divisors, whose sum is σ = 79998.
Its totient is φ = 79996.
The previous prime is 79987. The next prime is 79999.
79997 is nontrivially palindromic in base 10.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 52441 + 27556 = 229^2 + 166^2
It is a palprime.
It is a cyclic number.
It is not a de Polignac number, because 79997 - 216 = 14461 is a prime.
Together with 79999, it forms a pair of twin primes.
It is a Chen prime.
It is an Ulam number.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (79999) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39998 + 39999.
It is an arithmetic number, because the mean of its divisors is an integer number (39999).
279997 is an apocalyptic number.
It is an amenable number.
79997 is a deficient number, since it is larger than the sum of its proper divisors (1).
79997 is an equidigital number, since it uses as much as digits as its factorization.
79997 is an evil number, because the sum of its binary digits is even.
The product of its digits is 35721, while the sum is 41.
The square root of 79997 is about 282.8374091240.
The cubic root of 79997 is about 43.0881551852.
The spelling of 79997 in words is "seventy-nine thousand, nine hundred ninety-seven".