6309778987 has 2 divisors, whose sum is σ = 6309778988. Its totient is φ = 6309778986.

The previous prime is 6309778963. The next prime is 6309779051. The reversal of 6309778987 is 7898779036.

It is an a-pointer prime, because the next prime (6309779051) can be obtained adding 6309778987 to its sum of digits (64).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6309778987 - 2⁷ = 6309778859 is a prime.

It is not a weakly prime, because it can be changed into another prime (6309778687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3154889493 + 3154889494.

It is an arithmetic number, because the mean of its divisors is an integer number (3154889494).

Almost surely, 2^6309778987 is an apocalyptic number.

6309778987 is a deficient number, since it is larger than the sum of its proper divisors (1).

6309778987 is an equidigital number, since it uses as much as digits as its factorization.

6309778987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32006016, while the sum is 64.

The square root of 6309778987 is about 79434.1172733732. The cubic root of 6309778987 is about 1847.8698625391.

The spelling of 6309778987 in words is "six billion, three hundred nine million, seven hundred seventy-eight thousand, nine hundred eighty-seven".