27998767 has 2 divisors, whose sum is σ = 27998768. Its totient is φ = 27998766.

The previous prime is 27998753. The next prime is 27998807. The reversal of 27998767 is 76789972.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27998767 - 2¹⁹ = 27474479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27999767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13999383 + 13999384.

It is an arithmetic number, because the mean of its divisors is an integer number (13999384).

Almost surely, 2^27998767 is an apocalyptic number.

27998767 is a deficient number, since it is larger than the sum of its proper divisors (1).

27998767 is an equidigital number, since it uses as much as digits as its factorization.

27998767 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2667168, while the sum is 55.

The square root of 27998767 is about 5291.3861132977. The cubic root of 27998767 is about 303.6544398433.

The spelling of 27998767 in words is "twenty-seven million, nine hundred ninety-eight thousand, seven hundred sixty-seven".