28197167 has 2 divisors, whose sum is σ = 28197168. Its totient is φ = 28197166.

The previous prime is 28197157. The next prime is 28197173. The reversal of 28197167 is 76179182.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28197167 - 2⁸ = 28196911 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28197137) 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, 14098583 + 14098584.

It is an arithmetic number, because the mean of its divisors is an integer number (14098584).

Almost surely, 2^28197167 is an apocalyptic number.

28197167 is a deficient number, since it is larger than the sum of its proper divisors (1).

28197167 is an equidigital number, since it uses as much as digits as its factorization.

28197167 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42336, while the sum is 41.

The square root of 28197167 is about 5310.1004698593. The cubic root of 28197167 is about 304.3699868185.

The spelling of 28197167 in words is "twenty-eight million, one hundred ninety-seven thousand, one hundred sixty-seven".