8791638943 has 2 divisors, whose sum is σ = 8791638944. Its totient is φ = 8791638942.

The previous prime is 8791638937. The next prime is 8791639001. The reversal of 8791638943 is 3498361978.

It is an a-pointer prime, because the next prime (8791639001) can be obtained adding 8791638943 to its sum of digits (58).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8791638943 - 2²¹ = 8789541791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8791638913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4395819471 + 4395819472.

It is an arithmetic number, because the mean of its divisors is an integer number (4395819472).

Almost surely, 2^8791638943 is an apocalyptic number.

8791638943 is a deficient number, since it is larger than the sum of its proper divisors (1).

8791638943 is an equidigital number, since it uses as much as digits as its factorization.

8791638943 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7838208, while the sum is 58.

The square root of 8791638943 is about 93763.7400224628. The cubic root of 8791638943 is about 2063.9061636544.

The spelling of 8791638943 in words is "eight billion, seven hundred ninety-one million, six hundred thirty-eight thousand, nine hundred forty-three".