918317 has 4 divisors (see below), whose sum is σ = 921120. Its totient is φ = 915516.

The previous prime is 918301. The next prime is 918319. The reversal of 918317 is 713819.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 713819 = 131 ⋅5449.

It is a cyclic number.

It is not a de Polignac number, because 918317 - 2⁴ = 918301 is a prime.

It is a super-2 number, since 2×918317² = 1686612224978, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 918317.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 918317.

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, 833 + ... + 1590.

It is an arithmetic number, because the mean of its divisors is an integer number (230280).

2⁹¹⁸³¹⁷ is an apocalyptic number.

It is an amenable number.

918317 is a deficient number, since it is larger than the sum of its proper divisors (2803).

918317 is a wasteful number, since it uses less digits than its factorization.

918317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2802.

The product of its digits is 1512, while the sum is 29.

The square root of 918317 is about 958.2885786651. The cubic root of 918317 is about 97.1995396457.

The spelling of 918317 in words is "nine hundred eighteen thousand, three hundred seventeen".