326640361 has 2 divisors, whose sum is σ = 326640362. Its totient is φ = 326640360.

The previous prime is 326640323. The next prime is 326640407. The reversal of 326640361 is 163046623.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 205750336 + 120890025 = 14344^2 + 10995^2 .

It is a cyclic number.

It is not a de Polignac number, because 326640361 - 2⁷ = 326640233 is a prime.

It is not a weakly prime, because it can be changed into another prime (326650361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 163320180 + 163320181.

It is an arithmetic number, because the mean of its divisors is an integer number (163320181).

Almost surely, 2^326640361 is an apocalyptic number.

It is an amenable number.

326640361 is a deficient number, since it is larger than the sum of its proper divisors (1).

326640361 is an equidigital number, since it uses as much as digits as its factorization.

326640361 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 31.

The square root of 326640361 is about 18073.1945433009. The cubic root of 326640361 is about 688.6892156199.

Adding to 326640361 its reverse (163046623), we get a palindrome (489686984).

The spelling of 326640361 in words is "three hundred twenty-six million, six hundred forty thousand, three hundred sixty-one".