9939866747 has 2 divisors, whose sum is σ = 9939866748. Its totient is φ = 9939866746.

The previous prime is 9939866723. The next prime is 9939866759. The reversal of 9939866747 is 7476689399.

9939866747 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9939866747 - 2⁶ = 9939866683 is a prime.

It is not a weakly prime, because it can be changed into another prime (9939866767) 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, 4969933373 + 4969933374.

It is an arithmetic number, because the mean of its divisors is an integer number (4969933374).

Almost surely, 2^9939866747 is an apocalyptic number.

9939866747 is a deficient number, since it is larger than the sum of its proper divisors (1).

9939866747 is an equidigital number, since it uses as much as digits as its factorization.

9939866747 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 123451776, while the sum is 68.

The square root of 9939866747 is about 99698.8803698417. The cubic root of 9939866747 is about 2150.1075660623.

The spelling of 9939866747 in words is "nine billion, nine hundred thirty-nine million, eight hundred sixty-six thousand, seven hundred forty-seven".