823313 has 4 divisors (see below), whose sum is σ = 828528. Its totient is φ = 818100.

The previous prime is 823309. The next prime is 823337. The reversal of 823313 is 313328.

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 823313 - 2² = 823309 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 7.

It is not an unprimeable number, because it can be changed into a prime (823373) 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, 2363 + ... + 2688.

It is an arithmetic number, because the mean of its divisors is an integer number (207132).

2⁸²³³¹³ is an apocalyptic number.

It is an amenable number.

823313 is a deficient number, since it is larger than the sum of its proper divisors (5215).

823313 is a wasteful number, since it uses less digits than its factorization.

823313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5214.

The product of its digits is 432, while the sum is 20.

The square root of 823313 is about 907.3659680636. The cubic root of 823313 is about 93.7249011330.

The spelling of 823313 in words is "eight hundred twenty-three thousand, three hundred thirteen".