8047871987 has 2 divisors, whose sum is σ = 8047871988. Its totient is φ = 8047871986.

The previous prime is 8047871981. The next prime is 8047872023. The reversal of 8047871987 is 7891787408.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8047871987 is a prime.

It is not a weakly prime, because it can be changed into another prime (8047871981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4023935993 + 4023935994.

It is an arithmetic number, because the mean of its divisors is an integer number (4023935994).

Almost surely, 2^8047871987 is an apocalyptic number.

8047871987 is a deficient number, since it is larger than the sum of its proper divisors (1).

8047871987 is an equidigital number, since it uses as much as digits as its factorization.

8047871987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6322176, while the sum is 59.

The square root of 8047871987 is about 89709.9324879915. The cubic root of 8047871987 is about 2003.9814012129.

The spelling of 8047871987 in words is "eight billion, forty-seven million, eight hundred seventy-one thousand, nine hundred eighty-seven".