27864797 has 2 divisors, whose sum is σ = 27864798. Its totient is φ = 27864796.

The previous prime is 27864791. The next prime is 27864821. The reversal of 27864797 is 79746872.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21659716 + 6205081 = 4654^2 + 2491^2 .

It is a cyclic number.

It is not a de Polignac number, because 27864797 - 2⁸ = 27864541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27864791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13932398 + 13932399.

It is an arithmetic number, because the mean of its divisors is an integer number (13932399).

Almost surely, 2^27864797 is an apocalyptic number.

It is an amenable number.

27864797 is a deficient number, since it is larger than the sum of its proper divisors (1).

27864797 is an equidigital number, since it uses as much as digits as its factorization.

27864797 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1185408, while the sum is 50.

The square root of 27864797 is about 5278.7116799462. The cubic root of 27864797 is about 303.1693513168.

The spelling of 27864797 in words is "twenty-seven million, eight hundred sixty-four thousand, seven hundred ninety-seven".