321264409 has 2 divisors, whose sum is σ = 321264410. Its totient is φ = 321264408.

The previous prime is 321264403. The next prime is 321264431. The reversal of 321264409 is 904462123.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 319694400 + 1570009 = 17880^2 + 1253^2 .

It is a cyclic number.

It is not a de Polignac number, because 321264409 - 2²⁷ = 187046681 is a prime.

It is not a weakly prime, because it can be changed into another prime (321264403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160632204 + 160632205.

It is an arithmetic number, because the mean of its divisors is an integer number (160632205).

Almost surely, 2^321264409 is an apocalyptic number.

It is an amenable number.

321264409 is a deficient number, since it is larger than the sum of its proper divisors (1).

321264409 is an equidigital number, since it uses as much as digits as its factorization.

321264409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 321264409 is about 17923.8502839094. The cubic root of 321264409 is about 684.8900734680.

The spelling of 321264409 in words is "three hundred twenty-one million, two hundred sixty-four thousand, four hundred nine".