818313 has 4 divisors (see below), whose sum is σ = 1091088. Its totient is φ = 545540.

The previous prime is 818309. The next prime is 818327. The reversal of 818313 is 313818.

818313 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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.

It is a cyclic number.

It is not a de Polignac number, because 818313 - 2² = 818309 is a prime.

It is a D-number.

It is a Curzon number.

It is a plaindrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (818303) 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, 136383 + ... + 136388.

It is an arithmetic number, because the mean of its divisors is an integer number (272772).

2⁸¹⁸³¹³ is an apocalyptic number.

It is an amenable number.

818313 is a deficient number, since it is larger than the sum of its proper divisors (272775).

818313 is a wasteful number, since it uses less digits than its factorization.

818313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272774.

The product of its digits is 576, while the sum is 24.

The square root of 818313 is about 904.6065443053. The cubic root of 818313 is about 93.5347845449.

The spelling of 818313 in words is "eight hundred eighteen thousand, three hundred thirteen".