326687213 has 2 divisors, whose sum is σ = 326687214. Its totient is φ = 326687212.

The previous prime is 326687209. The next prime is 326687281. The reversal of 326687213 is 312786623.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 301265449 + 25421764 = 17357^2 + 5042^2 .

It is an emirp because it is prime and its reverse (312786623) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 326687213 - 2² = 326687209 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (326684213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 163343606 + 163343607.

It is an arithmetic number, because the mean of its divisors is an integer number (163343607).

Almost surely, 2^326687213 is an apocalyptic number.

It is an amenable number.

326687213 is a deficient number, since it is larger than the sum of its proper divisors (1).

326687213 is an equidigital number, since it uses as much as digits as its factorization.

326687213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 38.

The square root of 326687213 is about 18074.4906705556. The cubic root of 326687213 is about 688.7221416637.

The spelling of 326687213 in words is "three hundred twenty-six million, six hundred eighty-seven thousand, two hundred thirteen".