4089091 has 4 divisors (see below), whose sum is σ = 4110472. Its totient is φ = 4067712.

The previous prime is 4089089. The next prime is 4089097. The reversal of 4089091 is 1909804.

4089091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 4089091 - 2¹ = 4089089 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4089097) 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 in 3 ways as a sum of consecutive naturals, for example, 10401 + ... + 10786.

It is an arithmetic number, because the mean of its divisors is an integer number (1027618).

Almost surely, 2^4089091 is an apocalyptic number.

4089091 is a deficient number, since it is larger than the sum of its proper divisors (21381).

4089091 is a wasteful number, since it uses less digits than its factorization.

4089091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21380.

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

The square root of 4089091 is about 2022.1500933412. The cubic root of 4089091 is about 159.9099884340.

The spelling of 4089091 in words is "four million, eighty-nine thousand, ninety-one".