311089 has 4 divisors (see below), whose sum is σ = 313956. Its totient is φ = 308224.

The previous prime is 311041. The next prime is 311099. The reversal of 311089 is 980113.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 980113 = 29 ⋅33797.

It can be written as a sum of positive squares in 2 ways, for example, as 134689 + 176400 = 367^2 + 420^2 .

It is a cyclic number.

It is not a de Polignac number, because 311089 - 2⁹ = 310577 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 not an unprimeable number, because it can be changed into a prime (311009) 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, 1264 + ... + 1489.

It is an arithmetic number, because the mean of its divisors is an integer number (78489).

2³¹¹⁰⁸⁹ is an apocalyptic number.

It is an amenable number.

311089 is a deficient number, since it is larger than the sum of its proper divisors (2867).

311089 is a wasteful number, since it uses less digits than its factorization.

311089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2866.

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 311089 is about 557.7535297961. The cubic root of 311089 is about 67.7581518220.

It can be divided in two parts, 31108 and 9, that multiplied together give a palindrome (279972).

The spelling of 311089 in words is "three hundred eleven thousand, eighty-nine".