311849 has 4 divisors (see below), whose sum is σ = 314820. Its totient is φ = 308880.

The previous prime is 311827. The next prime is 311867. The reversal of 311849 is 948113.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 948113 = 239 ⋅3967.

It can be written as a sum of positive squares in 2 ways, for example, as 196249 + 115600 = 443^2 + 340^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-311849 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 311849.

It is not an unprimeable number, because it can be changed into a prime (311869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1322 + ... + 1539.

It is an arithmetic number, because the mean of its divisors is an integer number (78705).

2³¹¹⁸⁴⁹ is an apocalyptic number.

It is an amenable number.

311849 is a deficient number, since it is larger than the sum of its proper divisors (2971).

311849 is a wasteful number, since it uses less digits than its factorization.

311849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2970.

The product of its digits is 864, while the sum is 26.

The square root of 311849 is about 558.4344187100. The cubic root of 311849 is about 67.8132853654.

The spelling of 311849 in words is "three hundred eleven thousand, eight hundred forty-nine".