326520813 has 8 divisors (see below), whose sum is σ = 437056128. Its totient is φ = 216833024.

The previous prime is 326520781. The next prime is 326520823. The reversal of 326520813 is 318025623.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 326520813 - 2⁵ = 326520781 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (326520823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 210981 + ... + 212522.

It is an arithmetic number, because the mean of its divisors is an integer number (54632016).

Almost surely, 2^326520813 is an apocalyptic number.

It is an amenable number.

326520813 is a deficient number, since it is larger than the sum of its proper divisors (110535315).

326520813 is a wasteful number, since it uses less digits than its factorization.

326520813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423763.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 326520813 is about 18069.8869116550. The cubic root of 326520813 is about 688.6051869506.

The spelling of 326520813 in words is "three hundred twenty-six million, five hundred twenty thousand, eight hundred thirteen".