87317 has 2 divisors, whose sum is σ = 87318. Its totient is φ = 87316.

The previous prime is 87313. The next prime is 87323. The reversal of 87317 is 71378.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64516 + 22801 = 254^2 + 151^2 .

It is a cyclic number.

It is not a de Polignac number, because 87317 - 2² = 87313 is a prime.

It is a Chen prime.

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 87317.

It is not a weakly prime, because it can be changed into another prime (87313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43658 + 43659.

It is an arithmetic number, because the mean of its divisors is an integer number (43659).

2⁸⁷³¹⁷ is an apocalyptic number.

It is an amenable number.

87317 is a deficient number, since it is larger than the sum of its proper divisors (1).

87317 is an equidigital number, since it uses as much as digits as its factorization.

87317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1176, while the sum is 26.

The square root of 87317 is about 295.4945007949. The cubic root of 87317 is about 44.3642286890.

It can be divided in two parts, 873 and 17, that multiplied together give a palindrome (14841).

The spelling of 87317 in words is "eighty-seven thousand, three hundred seventeen".