9712064891 has 2 divisors, whose sum is σ = 9712064892. Its totient is φ = 9712064890.

The previous prime is 9712064821. The next prime is 9712064911. The reversal of 9712064891 is 1984602179.

9712064891 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 a de Polignac number, because none of the positive numbers 2^k-9712064891 is a prime.

It is not a weakly prime, because it can be changed into another prime (9712064821) 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, 4856032445 + 4856032446.

It is an arithmetic number, because the mean of its divisors is an integer number (4856032446).

Almost surely, 2^9712064891 is an apocalyptic number.

9712064891 is a deficient number, since it is larger than the sum of its proper divisors (1).

9712064891 is an equidigital number, since it uses as much as digits as its factorization.

9712064891 is an odious number, because the sum of its binary digits is odd.

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

The square root of 9712064891 is about 98549.8091880446. The cubic root of 9712064891 is about 2133.5550769317. Note that the first 3 decimals are identical.

The spelling of 9712064891 in words is "nine billion, seven hundred twelve million, sixty-four thousand, eight hundred ninety-one".