3509891 has 16 divisors (see below), whose sum is σ = 4439040. Its totient is φ = 2695680.

The previous prime is 3509881. The next prime is 3509903. The reversal of 3509891 is 1989053.

3509891 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 3509891 - 2⁶ = 3509827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3509801) 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 15 ways as a sum of consecutive naturals, for example, 5795 + ... + 6371.

It is an arithmetic number, because the mean of its divisors is an integer number (277440).

Almost surely, 2^3509891 is an apocalyptic number.

3509891 is a deficient number, since it is larger than the sum of its proper divisors (929149).

3509891 is a wasteful number, since it uses less digits than its factorization.

3509891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 674.

The product of its (nonzero) digits is 9720, while the sum is 35.

The square root of 3509891 is about 1873.4703093457. The cubic root of 3509891 is about 151.9723374175.

The spelling of 3509891 in words is "three million, five hundred nine thousand, eight hundred ninety-one".