4009091 has 2 divisors, whose sum is σ = 4009092. Its totient is φ = 4009090.

The previous prime is 4009051. The next prime is 4009097. The reversal of 4009091 is 1909004.

4009091 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 a de Polignac number, because none of the positive numbers 2^k-4009091 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (4009097) 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, 2004545 + 2004546.

It is an arithmetic number, because the mean of its divisors is an integer number (2004546).

Almost surely, 2^4009091 is an apocalyptic number.

4009091 is a deficient number, since it is larger than the sum of its proper divisors (1).

4009091 is an equidigital number, since it uses as much as digits as its factorization.

4009091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 4009091 is about 2002.2714601172. The cubic root of 4009091 is about 158.8602730636.

The spelling of 4009091 in words is "four million, nine thousand, ninety-one".