9089891 has 2 divisors, whose sum is σ = 9089892. Its totient is φ = 9089890.

The previous prime is 9089879. The next prime is 9089893. The reversal of 9089891 is 1989809.

9089891 is digitally balanced in base 2, 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 9089891 - 2²² = 4895587 is a prime.

It is a super-2 number, since 2×9089891² = 165252236783762, which contains 22 as substring.

Together with 9089893, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (9089893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4544945 + 4544946.

It is an arithmetic number, because the mean of its divisors is an integer number (4544946).

Almost surely, 2^9089891 is an apocalyptic number.

9089891 is a deficient number, since it is larger than the sum of its proper divisors (1).

9089891 is an equidigital number, since it uses as much as digits as its factorization.

9089891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46656, while the sum is 44.

The square root of 9089891 is about 3014.9446097731. The cubic root of 9089891 is about 208.6986109415.

The spelling of 9089891 in words is "nine million, eighty-nine thousand, eight hundred ninety-one".