28677197 has 2 divisors, whose sum is σ = 28677198. Its totient is φ = 28677196.

The previous prime is 28677193. The next prime is 28677211. The reversal of 28677197 is 79177682.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28665316 + 11881 = 5354^2 + 109^2 .

It is a cyclic number.

It is not a de Polignac number, because 28677197 - 2² = 28677193 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28677193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14338598 + 14338599.

It is an arithmetic number, because the mean of its divisors is an integer number (14338599).

Almost surely, 2^28677197 is an apocalyptic number.

It is an amenable number.

28677197 is a deficient number, since it is larger than the sum of its proper divisors (1).

28677197 is an equidigital number, since it uses as much as digits as its factorization.

28677197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 296352, while the sum is 47.

The square root of 28677197 is about 5355.1094293207. The cubic root of 28677197 is about 306.0874805062.

The spelling of 28677197 in words is "twenty-eight million, six hundred seventy-seven thousand, one hundred ninety-seven".