11847889987 has 2 divisors, whose sum is σ = 11847889988. Its totient is φ = 11847889986.

The previous prime is 11847889981. The next prime is 11847889997. The reversal of 11847889987 is 78998874811.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11847889987 is a prime.

It is not a weakly prime, because it can be changed into another prime (11847889981) 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, 5923944993 + 5923944994.

It is an arithmetic number, because the mean of its divisors is an integer number (5923944994).

Almost surely, 2^11847889987 is an apocalyptic number.

11847889987 is a deficient number, since it is larger than the sum of its proper divisors (1).

11847889987 is an equidigital number, since it uses as much as digits as its factorization.

11847889987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 65028096, while the sum is 70.

The spelling of 11847889987 in words is "eleven billion, eight hundred forty-seven million, eight hundred eighty-nine thousand, nine hundred eighty-seven".