855317 has 2 divisors, whose sum is σ = 855318. Its totient is φ = 855316.

The previous prime is 855311. The next prime is 855331. The reversal of 855317 is 713558.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 662596 + 192721 = 814^2 + 439^2 .

It is a cyclic number.

It is not a de Polignac number, because 855317 - 2⁸ = 855061 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 855317.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (855311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 427658 + 427659.

It is an arithmetic number, because the mean of its divisors is an integer number (427659).

2⁸⁵⁵³¹⁷ is an apocalyptic number.

It is an amenable number.

855317 is a deficient number, since it is larger than the sum of its proper divisors (1).

855317 is an equidigital number, since it uses as much as digits as its factorization.

855317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4200, while the sum is 29.

The square root of 855317 is about 924.8334985282. The cubic root of 855317 is about 94.9239280207.

The spelling of 855317 in words is "eight hundred fifty-five thousand, three hundred seventeen".