8994891943 has 2 divisors, whose sum is σ = 8994891944. Its totient is φ = 8994891942.

The previous prime is 8994891931. The next prime is 8994891953. The reversal of 8994891943 is 3491984998.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8994891943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8994891953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4497445971 + 4497445972.

It is an arithmetic number, because the mean of its divisors is an integer number (4497445972).

Almost surely, 2^8994891943 is an apocalyptic number.

8994891943 is a deficient number, since it is larger than the sum of its proper divisors (1).

8994891943 is an equidigital number, since it uses as much as digits as its factorization.

8994891943 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20155392, while the sum is 64.

The square root of 8994891943 is about 94841.4041597867. The cubic root of 8994891943 is about 2079.6902231439.

The spelling of 8994891943 in words is "eight billion, nine hundred ninety-four million, eight hundred ninety-one thousand, nine hundred forty-three".