311087 has 8 divisors (see below), whose sum is σ = 374400. Its totient is φ = 252504.

The previous prime is 311041. The next prime is 311099. The reversal of 311087 is 780113.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 311087 - 2⁸ = 310831 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1037 + ... + 1302.

It is an arithmetic number, because the mean of its divisors is an integer number (46800).

2³¹¹⁰⁸⁷ is an apocalyptic number.

311087 is a deficient number, since it is larger than the sum of its proper divisors (63313).

311087 is a wasteful number, since it uses less digits than its factorization.

311087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2365.

The product of its (nonzero) digits is 168, while the sum is 20.

The square root of 311087 is about 557.7517368866. The cubic root of 311087 is about 67.7580066154.

The spelling of 311087 in words is "three hundred eleven thousand, eighty-seven".