7987717811 has 2 divisors, whose sum is σ = 7987717812. Its totient is φ = 7987717810.

The previous prime is 7987717799. The next prime is 7987717813. The reversal of 7987717811 is 1187177897.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 7987717811 - 2¹⁸ = 7987455667 is a prime.

Together with 7987717813, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (7987717813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3993858905 + 3993858906.

It is an arithmetic number, because the mean of its divisors is an integer number (3993858906).

Almost surely, 2^7987717811 is an apocalyptic number.

7987717811 is a deficient number, since it is larger than the sum of its proper divisors (1).

7987717811 is an equidigital number, since it uses as much as digits as its factorization.

7987717811 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1382976, while the sum is 56.

The square root of 7987717811 is about 89374.0332031625. The cubic root of 7987717811 is about 1998.9759600105.

The spelling of 7987717811 in words is "seven billion, nine hundred eighty-seven million, seven hundred seventeen thousand, eight hundred eleven".