918311 has 4 divisors (see below), whose sum is σ = 925152. Its totient is φ = 911472.

The previous prime is 918301. The next prime is 918319. The reversal of 918311 is 113819.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-918311 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 (918319) 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, 3215 + ... + 3488.

It is an arithmetic number, because the mean of its divisors is an integer number (231288).

2⁹¹⁸³¹¹ is an apocalyptic number.

918311 is a deficient number, since it is larger than the sum of its proper divisors (6841).

918311 is a wasteful number, since it uses less digits than its factorization.

918311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6840.

The product of its digits is 216, while the sum is 23.

The square root of 918311 is about 958.2854480790. The cubic root of 918311 is about 97.1993279546.

The spelling of 918311 in words is "nine hundred eighteen thousand, three hundred eleven".