27989873999 has 2 divisors, whose sum is σ = 27989874000. Its totient is φ = 27989873998.

The previous prime is 27989873957. The next prime is 27989874007. The reversal of 27989873999 is 99937898972.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27989873999 - 2¹⁶ = 27989808463 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27989873699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13994936999 + 13994937000.

It is an arithmetic number, because the mean of its divisors is an integer number (13994937000).

Almost surely, 2^27989873999 is an apocalyptic number.

27989873999 is a deficient number, since it is larger than the sum of its proper divisors (1).

27989873999 is an equidigital number, since it uses as much as digits as its factorization.

27989873999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1111065984, while the sum is 80.

The spelling of 27989873999 in words is "twenty-seven billion, nine hundred eighty-nine million, eight hundred seventy-three thousand, nine hundred ninety-nine".