326813 has 4 divisors (see below), whose sum is σ = 331488. Its totient is φ = 322140.

The previous prime is 326779. The next prime is 326831. The reversal of 326813 is 318623.

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, and also an emirpimes, since its reverse is a distinct semiprime: 318623 = 29 ⋅10987.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-326813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (326863) 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, 2231 + ... + 2372.

It is an arithmetic number, because the mean of its divisors is an integer number (82872).

2³²⁶⁸¹³ is an apocalyptic number.

It is an amenable number.

326813 is a deficient number, since it is larger than the sum of its proper divisors (4675).

326813 is an equidigital number, since it uses as much as digits as its factorization.

326813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4674.

The product of its digits is 864, while the sum is 23.

The square root of 326813 is about 571.6756073159. The cubic root of 326813 is about 68.8810525059.

Adding to 326813 its sum of digits (23), we get a triangular number (326836 = T₈₀₈).

The spelling of 326813 in words is "three hundred twenty-six thousand, eight hundred thirteen".