318823 has 2 divisors, whose sum is σ = 318824. Its totient is φ = 318822.

The previous prime is 318817. The next prime is 318833. The reversal of 318823 is 328813.

It is a weak prime.

It is an emirp because it is prime and its reverse (328813) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 318823 - 2¹⁷ = 187751 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (318833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159411 + 159412.

It is an arithmetic number, because the mean of its divisors is an integer number (159412).

2³¹⁸⁸²³ is an apocalyptic number.

318823 is a deficient number, since it is larger than the sum of its proper divisors (1).

318823 is an equidigital number, since it uses as much as digits as its factorization.

318823 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1152, while the sum is 25.

The square root of 318823 is about 564.6441357174. The cubic root of 318823 is about 68.3150747701.

The spelling of 318823 in words is "three hundred eighteen thousand, eight hundred twenty-three".