326668009 has 2 divisors, whose sum is σ = 326668010. Its totient is φ = 326668008.

The previous prime is 326667949. The next prime is 326668051. The reversal of 326668009 is 900866623.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 324108009 + 2560000 = 18003^2 + 1600^2 .

It is a cyclic number.

It is not a de Polignac number, because 326668009 - 2⁷ = 326667881 is a prime.

It is not a weakly prime, because it can be changed into another prime (326668099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 163334004 + 163334005.

It is an arithmetic number, because the mean of its divisors is an integer number (163334005).

Almost surely, 2^326668009 is an apocalyptic number.

It is an amenable number.

326668009 is a deficient number, since it is larger than the sum of its proper divisors (1).

326668009 is an equidigital number, since it uses as much as digits as its factorization.

326668009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 93312, while the sum is 40.

The square root of 326668009 is about 18073.9594167963. The cubic root of 326668009 is about 688.7086461052.

The spelling of 326668009 in words is "three hundred twenty-six million, six hundred sixty-eight thousand, nine".