311959 has 4 divisors (see below), whose sum is σ = 314104. Its totient is φ = 309816.

The previous prime is 311957. The next prime is 311963. The reversal of 311959 is 959113.

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

It is a cyclic number.

It is not a de Polignac number, because 311959 - 2¹ = 311957 is a prime.

It is a Duffinian number.

311959 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311951) 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, 837 + ... + 1150.

It is an arithmetic number, because the mean of its divisors is an integer number (78526).

2³¹¹⁹⁵⁹ is an apocalyptic number.

311959 is a deficient number, since it is larger than the sum of its proper divisors (2145).

311959 is a wasteful number, since it uses less digits than its factorization.

311959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2144.

The product of its digits is 1215, while the sum is 28.

The square root of 311959 is about 558.5328996577. The cubic root of 311959 is about 67.8212577970.

The spelling of 311959 in words is "three hundred eleven thousand, nine hundred fifty-nine".