9897447863 has 2 divisors, whose sum is σ = 9897447864. Its totient is φ = 9897447862.

The previous prime is 9897447811. The next prime is 9897447869. The reversal of 9897447863 is 3687447989.

9897447863 is digitally balanced in base 3, 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 9897447863 - 2⁶ = 9897447799 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9897447863.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9897447869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4948723931 + 4948723932.

It is an arithmetic number, because the mean of its divisors is an integer number (4948723932).

Almost surely, 2^9897447863 is an apocalyptic number.

9897447863 is a deficient number, since it is larger than the sum of its proper divisors (1).

9897447863 is an equidigital number, since it uses as much as digits as its factorization.

9897447863 is an evil number, because the sum of its binary digits is even.

The product of its digits is 73156608, while the sum is 65.

The square root of 9897447863 is about 99485.9179130393. The cubic root of 9897447863 is about 2147.0446406022.

The spelling of 9897447863 in words is "nine billion, eight hundred ninety-seven million, four hundred forty-seven thousand, eight hundred sixty-three".