8971396243 has 2 divisors, whose sum is σ = 8971396244. Its totient is φ = 8971396242.

The previous prime is 8971396201. The next prime is 8971396309. The reversal of 8971396243 is 3426931798.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8971396243 - 2⁹ = 8971395731 is a prime.

It is not a weakly prime, because it can be changed into another prime (8971396843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4485698121 + 4485698122.

It is an arithmetic number, because the mean of its divisors is an integer number (4485698122).

Almost surely, 2^8971396243 is an apocalyptic number.

8971396243 is a deficient number, since it is larger than the sum of its proper divisors (1).

8971396243 is an equidigital number, since it uses as much as digits as its factorization.

8971396243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1959552, while the sum is 52.

The square root of 8971396243 is about 94717.4547958295. The cubic root of 8971396243 is about 2077.8778469017.

The spelling of 8971396243 in words is "eight billion, nine hundred seventy-one million, three hundred ninety-six thousand, two hundred forty-three".