326905213 has 2 divisors, whose sum is σ = 326905214. Its totient is φ = 326905212.

The previous prime is 326905207. The next prime is 326905217. The reversal of 326905213 is 312509623.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 280160644 + 46744569 = 16738^2 + 6837^2 .

It is a cyclic number.

It is not a de Polignac number, because 326905213 - 2²¹ = 324808061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (326905217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 163452606 + 163452607.

It is an arithmetic number, because the mean of its divisors is an integer number (163452607).

Almost surely, 2^326905213 is an apocalyptic number.

It is an amenable number.

326905213 is a deficient number, since it is larger than the sum of its proper divisors (1).

326905213 is an equidigital number, since it uses as much as digits as its factorization.

326905213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9720, while the sum is 31.

The square root of 326905213 is about 18080.5202635322. The cubic root of 326905213 is about 688.8753035023.

The spelling of 326905213 in words is "three hundred twenty-six million, nine hundred five thousand, two hundred thirteen".