28667297 has 2 divisors, whose sum is σ = 28667298. Its totient is φ = 28667296.

The previous prime is 28667291. The next prime is 28667351. The reversal of 28667297 is 79276682.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23464336 + 5202961 = 4844^2 + 2281^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28667297 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28667291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14333648 + 14333649.

It is an arithmetic number, because the mean of its divisors is an integer number (14333649).

Almost surely, 2^28667297 is an apocalyptic number.

It is an amenable number.

28667297 is a deficient number, since it is larger than the sum of its proper divisors (1).

28667297 is an equidigital number, since it uses as much as digits as its factorization.

28667297 is an evil number, because the sum of its binary digits is even.

The product of its digits is 508032, while the sum is 47.

The square root of 28667297 is about 5354.1849986716. The cubic root of 28667297 is about 306.0522537390.

The spelling of 28667297 in words is "twenty-eight million, six hundred sixty-seven thousand, two hundred ninety-seven".