318817 has 2 divisors, whose sum is σ = 318818. Its totient is φ = 318816.

The previous prime is 318811. The next prime is 318823. The reversal of 318817 is 718813.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (318811) and next prime (318823).

It can be written as a sum of positive squares in only one way, i.e., 314721 + 4096 = 561^2 + 64^2 .

It is an emirp because it is prime and its reverse (718813) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 318817 - 2³ = 318809 is a prime.

It is a Chen prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (318811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159408 + 159409.

It is an arithmetic number, because the mean of its divisors is an integer number (159409).

2³¹⁸⁸¹⁷ is an apocalyptic number.

It is an amenable number.

318817 is a deficient number, since it is larger than the sum of its proper divisors (1).

318817 is an equidigital number, since it uses as much as digits as its factorization.

318817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1344, while the sum is 28.

The square root of 318817 is about 564.6388226114. The cubic root of 318817 is about 68.3146462220.

The spelling of 318817 in words is "three hundred eighteen thousand, eight hundred seventeen".