6331118987 has 2 divisors, whose sum is σ = 6331118988. Its totient is φ = 6331118986.

The previous prime is 6331118929. The next prime is 6331118993. The reversal of 6331118987 is 7898111336.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6331118987 is a prime.

It is not a weakly prime, because it can be changed into another prime (6331117987) 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, 3165559493 + 3165559494.

It is an arithmetic number, because the mean of its divisors is an integer number (3165559494).

Almost surely, 2^6331118987 is an apocalyptic number.

6331118987 is a deficient number, since it is larger than the sum of its proper divisors (1).

6331118987 is an equidigital number, since it uses as much as digits as its factorization.

6331118987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 217728, while the sum is 47.

The square root of 6331118987 is about 79568.3290449159. The cubic root of 6331118987 is about 1849.9507157068.

The spelling of 6331118987 in words is "six billion, three hundred thirty-one million, one hundred eighteen thousand, nine hundred eighty-seven".