326345681 has 2 divisors, whose sum is σ = 326345682. Its totient is φ = 326345680.

The previous prime is 326345647. The next prime is 326345683. The reversal of 326345681 is 186543623.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 258695056 + 67650625 = 16084^2 + 8225^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-326345681 is a prime.

It is a super-2 number, since 2×326345681² = 213003007014707522, which contains 22 as substring.

Together with 326345683, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (326345683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 163172840 + 163172841.

It is an arithmetic number, because the mean of its divisors is an integer number (163172841).

Almost surely, 2^326345681 is an apocalyptic number.

It is an amenable number.

326345681 is a deficient number, since it is larger than the sum of its proper divisors (1).

326345681 is an equidigital number, since it uses as much as digits as its factorization.

326345681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 103680, while the sum is 38.

The square root of 326345681 is about 18065.0402988756. The cubic root of 326345681 is about 688.4820520015.

The spelling of 326345681 in words is "three hundred twenty-six million, three hundred forty-five thousand, six hundred eighty-one".