9040891 has 2 divisors, whose sum is σ = 9040892. Its totient is φ = 9040890.

The previous prime is 9040883. The next prime is 9040897. The reversal of 9040891 is 1980409.

It is a strong prime.

It is an emirp because it is prime and its reverse (1980409) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9040891 - 2³ = 9040883 is a prime.

It is equal to p₆₀₄₉₈₄ and since 9040891 and 604984 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (9040897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4520445 + 4520446.

It is an arithmetic number, because the mean of its divisors is an integer number (4520446).

Almost surely, 2^9040891 is an apocalyptic number.

9040891 is a deficient number, since it is larger than the sum of its proper divisors (1).

9040891 is an equidigital number, since it uses as much as digits as its factorization.

9040891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 9040891 is about 3006.8074431197. The cubic root of 9040891 is about 208.3229312495.

The spelling of 9040891 in words is "nine million, forty thousand, eight hundred ninety-one".