27989873699 has 2 divisors, whose sum is σ = 27989873700. Its totient is φ = 27989873698.

The previous prime is 27989873677. The next prime is 27989873753. The reversal of 27989873699 is 99637898972.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27989873699 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (27989873999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13994936849 + 13994936850.

It is an arithmetic number, because the mean of its divisors is an integer number (13994936850).

Almost surely, 2^27989873699 is an apocalyptic number.

27989873699 is a deficient number, since it is larger than the sum of its proper divisors (1).

27989873699 is an equidigital number, since it uses as much as digits as its factorization.

27989873699 is an evil number, because the sum of its binary digits is even.

The product of its digits is 740710656, while the sum is 77.

The spelling of 27989873699 in words is "twenty-seven billion, nine hundred eighty-nine million, eight hundred seventy-three thousand, six hundred ninety-nine".