9643694971 has 2 divisors, whose sum is σ = 9643694972. Its totient is φ = 9643694970.

The previous prime is 9643694933. The next prime is 9643695053. The reversal of 9643694971 is 1794963469.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9643694971 - 2⁷ = 9643694843 is a prime.

It is not a weakly prime, because it can be changed into another prime (9643698971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4821847485 + 4821847486.

It is an arithmetic number, because the mean of its divisors is an integer number (4821847486).

Almost surely, 2^9643694971 is an apocalyptic number.

9643694971 is a deficient number, since it is larger than the sum of its proper divisors (1).

9643694971 is an equidigital number, since it uses as much as digits as its factorization.

9643694971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8817984, while the sum is 58.

The square root of 9643694971 is about 98202.3165256299. The cubic root of 9643694971 is about 2128.5367609826.

The spelling of 9643694971 in words is "nine billion, six hundred forty-three million, six hundred ninety-four thousand, nine hundred seventy-one".