3111689 has 4 divisors (see below), whose sum is σ = 3556224. Its totient is φ = 2667156.

The previous prime is 3111679. The next prime is 3111721. The reversal of 3111689 is 9861113.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9861113 = 2017 ⋅4889.

It is a cyclic number.

It is not a de Polignac number, because 3111689 - 2⁴ = 3111673 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3111659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 222257 + ... + 222270.

It is an arithmetic number, because the mean of its divisors is an integer number (889056).

Almost surely, 2^3111689 is an apocalyptic number.

It is an amenable number.

3111689 is a deficient number, since it is larger than the sum of its proper divisors (444535).

3111689 is an equidigital number, since it uses as much as digits as its factorization.

3111689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444534.

The product of its digits is 1296, while the sum is 29.

The square root of 3111689 is about 1763.9980158719. The cubic root of 3111689 is about 145.9930096109.

The spelling of 3111689 in words is "three million, one hundred eleven thousand, six hundred eighty-nine".