28967999 has 2 divisors, whose sum is σ = 28968000. Its totient is φ = 28967998.

The previous prime is 28967993. The next prime is 28968001. The reversal of 28967999 is 99976982.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28967999 is a prime.

Together with 28968001, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28967993) 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, 14483999 + 14484000.

It is an arithmetic number, because the mean of its divisors is an integer number (14484000).

Almost surely, 2^28967999 is an apocalyptic number.

28967999 is a deficient number, since it is larger than the sum of its proper divisors (1).

28967999 is an equidigital number, since it uses as much as digits as its factorization.

28967999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4408992, while the sum is 59.

The square root of 28967999 is about 5382.1927687514. The cubic root of 28967999 is about 307.1186326873.

The spelling of 28967999 in words is "twenty-eight million, nine hundred sixty-seven thousand, nine hundred ninety-nine".