28697 has 2 divisors, whose sum is σ = 28698. Its totient is φ = 28696.

The previous prime is 28687. The next prime is 28703. The reversal of 28697 is 79682.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18496 + 10201 = 136^2 + 101^2 .

It is a cyclic number.

It is not a de Polignac number, because 28697 - 2¹⁰ = 27673 is a prime.

It is a Chen prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 28697.

It is not a weakly prime, because it can be changed into another prime (28607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14348 + 14349.

It is an arithmetic number, because the mean of its divisors is an integer number (14349).

2²⁸⁶⁹⁷ is an apocalyptic number.

It is an amenable number.

28697 is a deficient number, since it is larger than the sum of its proper divisors (1).

28697 is an equidigital number, since it uses as much as digits as its factorization.

28697 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 32.

The square root of 28697 is about 169.4018890095. The cubic root of 28697 is about 30.6157920395.

It can be divided in two parts, 286 and 97, that added together give a palindrome (383).

The spelling of 28697 in words is "twenty-eight thousand, six hundred ninety-seven".