79897 has 4 divisors (see below), whose sum is σ = 80740. Its totient is φ = 79056.

The previous prime is 79889. The next prime is 79901.

79897 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 69696 + 10201 = 264^2 + 101^2 .

It is a cyclic number.

It is not a de Polignac number, because 79897 - 2³ = 79889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 258 + ... + 475.

It is an arithmetic number, because the mean of its divisors is an integer number (20185).

2⁷⁹⁸⁹⁷ is an apocalyptic number.

It is an amenable number.

79897 is a deficient number, since it is larger than the sum of its proper divisors (843).

79897 is a wasteful number, since it uses less digits than its factorization.

79897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 842.

The product of its digits is 31752, while the sum is 40.

The square root of 79897 is about 282.6605738337. The cubic root of 79897 is about 43.0701936276.

The spelling of 79897 in words is "seventy-nine thousand, eight hundred ninety-seven".