8018891 has 2 divisors, whose sum is σ = 8018892. Its totient is φ = 8018890.

The previous prime is 8018887. The next prime is 8018909. The reversal of 8018891 is 1988108.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8018891 - 2² = 8018887 is a prime.

It is a super-2 number, since 2×8018891² = 128605225739762, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (8018851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4009445 + 4009446.

It is an arithmetic number, because the mean of its divisors is an integer number (4009446).

Almost surely, 2^8018891 is an apocalyptic number.

8018891 is a deficient number, since it is larger than the sum of its proper divisors (1).

8018891 is an equidigital number, since it uses as much as digits as its factorization.

8018891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 35.

The square root of 8018891 is about 2831.7646441751. The cubic root of 8018891 is about 200.1573012491.

The spelling of 8018891 in words is "eight million, eighteen thousand, eight hundred ninety-one".