311109 has 4 divisors (see below), whose sum is σ = 414816. Its totient is φ = 207404.

The previous prime is 311099. The next prime is 311111. The reversal of 311109 is 901113.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-311109 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311189) 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, 51849 + ... + 51854.

It is an arithmetic number, because the mean of its divisors is an integer number (103704).

2³¹¹¹⁰⁹ is an apocalyptic number.

It is an amenable number.

311109 is a deficient number, since it is larger than the sum of its proper divisors (103707).

311109 is a wasteful number, since it uses less digits than its factorization.

311109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103706.

The product of its (nonzero) digits is 27, while the sum is 15.

The square root of 311109 is about 557.7714585742. The cubic root of 311109 is about 67.7596038545.

The spelling of 311109 in words is "three hundred eleven thousand, one hundred nine".