9964975843 has 2 divisors, whose sum is σ = 9964975844. Its totient is φ = 9964975842.

The previous prime is 9964975829. The next prime is 9964975877. The reversal of 9964975843 is 3485794699.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9964975843 - 2²¹ = 9962878691 is a prime.

It is not a weakly prime, because it can be changed into another prime (9964975043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4982487921 + 4982487922.

It is an arithmetic number, because the mean of its divisors is an integer number (4982487922).

Almost surely, 2^9964975843 is an apocalyptic number.

9964975843 is a deficient number, since it is larger than the sum of its proper divisors (1).

9964975843 is an equidigital number, since it uses as much as digits as its factorization.

9964975843 is an evil number, because the sum of its binary digits is even.

The product of its digits is 58786560, while the sum is 64.

The square root of 9964975843 is about 99824.7256094401. The cubic root of 9964975843 is about 2151.9165058694.

The spelling of 9964975843 in words is "nine billion, nine hundred sixty-four million, nine hundred seventy-five thousand, eight hundred forty-three".