311867 has 2 divisors, whose sum is σ = 311868. Its totient is φ = 311866.

The previous prime is 311827. The next prime is 311869. The reversal of 311867 is 768113.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 311867 - 2⁶ = 311803 is a prime.

It is a super-2 number, since 2×311867² = 194522051378, which contains 22 as substring.

Together with 311869, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (311869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155933 + 155934.

It is an arithmetic number, because the mean of its divisors is an integer number (155934).

2³¹¹⁸⁶⁷ is an apocalyptic number.

311867 is a deficient number, since it is larger than the sum of its proper divisors (1).

311867 is an equidigital number, since it uses as much as digits as its factorization.

311867 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1008, while the sum is 26.

The square root of 311867 is about 558.4505349626. The cubic root of 311867 is about 67.8145900734.

The spelling of 311867 in words is "three hundred eleven thousand, eight hundred sixty-seven".