326605813 has 4 divisors (see below), whose sum is σ = 327067180. Its totient is φ = 326144448.

The previous prime is 326605793. The next prime is 326605817. The reversal of 326605813 is 318506623.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 53100369 + 273505444 = 7287^2 + 16538^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-326605813 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 (326605817) 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, 229620 + ... + 231037.

It is an arithmetic number, because the mean of its divisors is an integer number (81766795).

Almost surely, 2^326605813 is an apocalyptic number.

It is an amenable number.

326605813 is a deficient number, since it is larger than the sum of its proper divisors (461367).

326605813 is an equidigital number, since it uses as much as digits as its factorization.

326605813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 461366.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 326605813 is about 18072.2387379096. The cubic root of 326605813 is about 688.6649344055.

The spelling of 326605813 in words is "three hundred twenty-six million, six hundred five thousand, eight hundred thirteen".