8540891 has 2 divisors, whose sum is σ = 8540892. Its totient is φ = 8540890.

The previous prime is 8540869. The next prime is 8540893. The reversal of 8540891 is 1980458.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8540891 - 2¹⁴ = 8524507 is a prime.

Together with 8540893, 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 (8540893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4270445 + 4270446.

It is an arithmetic number, because the mean of its divisors is an integer number (4270446).

Almost surely, 2^8540891 is an apocalyptic number.

8540891 is a deficient number, since it is larger than the sum of its proper divisors (1).

8540891 is an equidigital number, since it uses as much as digits as its factorization.

8540891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 8540891 is about 2922.4802822260. The cubic root of 8540891 is about 204.4094924124.

The spelling of 8540891 in words is "eight million, five hundred forty thousand, eight hundred ninety-one".