3111709 has 4 divisors (see below), whose sum is σ = 3142620. Its totient is φ = 3080800.

The previous prime is 3111679. The next prime is 3111721. The reversal of 3111709 is 9071113.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2839225 + 272484 = 1685^2 + 522^2 .

It is a cyclic number.

It is not a de Polignac number, because 3111709 - 2⁵ = 3111677 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3111709.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3111769) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15304 + ... + 15505.

It is an arithmetic number, because the mean of its divisors is an integer number (785655).

Almost surely, 2^3111709 is an apocalyptic number.

It is an amenable number.

3111709 is a deficient number, since it is larger than the sum of its proper divisors (30911).

3111709 is a wasteful number, since it uses less digits than its factorization.

3111709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30910.

The product of its (nonzero) digits is 189, while the sum is 22.

The square root of 3111709 is about 1764.0036848034. The cubic root of 3111709 is about 145.9933223943.

The spelling of 3111709 in words is "three million, one hundred eleven thousand, seven hundred nine".