321336109 has 2 divisors, whose sum is σ = 321336110. Its totient is φ = 321336108.

The previous prime is 321336097. The next prime is 321336149. The reversal of 321336109 is 901633123.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 317018025 + 4318084 = 17805^2 + 2078^2 .

It is a cyclic number.

It is not a de Polignac number, because 321336109 - 2⁷ = 321335981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321336149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160668054 + 160668055.

It is an arithmetic number, because the mean of its divisors is an integer number (160668055).

Almost surely, 2^321336109 is an apocalyptic number.

It is an amenable number.

321336109 is a deficient number, since it is larger than the sum of its proper divisors (1).

321336109 is an equidigital number, since it uses as much as digits as its factorization.

321336109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916, while the sum is 28.

The square root of 321336109 is about 17925.8503006134. The cubic root of 321336109 is about 684.9410210822.

The spelling of 321336109 in words is "three hundred twenty-one million, three hundred thirty-six thousand, one hundred nine".