9861043963 has 2 divisors, whose sum is σ = 9861043964. Its totient is φ = 9861043962.

The previous prime is 9861043961. The next prime is 9861043981. The reversal of 9861043963 is 3693401689.

It is a weak prime.

It is an emirp because it is prime and its reverse (3693401689) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9861043963 - 2¹ = 9861043961 is a prime.

Together with 9861043961, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (9861043961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4930521981 + 4930521982.

It is an arithmetic number, because the mean of its divisors is an integer number (4930521982).

Almost surely, 2^9861043963 is an apocalyptic number.

9861043963 is a deficient number, since it is larger than the sum of its proper divisors (1).

9861043963 is an equidigital number, since it uses as much as digits as its factorization.

9861043963 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 839808, while the sum is 49.

The square root of 9861043963 is about 99302.7893012074. The cubic root of 9861043963 is about 2144.4090513145.

The spelling of 9861043963 in words is "nine billion, eight hundred sixty-one million, forty-three thousand, nine hundred sixty-three".