321671324309 has 4 divisors (see below), whose sum is σ = 321693996204. Its totient is φ = 321648652416.

The previous prime is 321671324267. The next prime is 321671324371. The reversal of 321671324309 is 903423176123.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 198294761809 + 123376562500 = 445303^2 + 351250^2 .

It is a cyclic number.

It is not a de Polignac number, because 321671324309 - 2¹⁶ = 321671258773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321671324389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11314652 + ... + 11343045.

It is an arithmetic number, because the mean of its divisors is an integer number (80423499051).

Almost surely, 2^321671324309 is an apocalyptic number.

It is an amenable number.

321671324309 is a deficient number, since it is larger than the sum of its proper divisors (22671895).

321671324309 is a wasteful number, since it uses less digits than its factorization.

321671324309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22671894.

The product of its (nonzero) digits is 163296, while the sum is 41.

The spelling of 321671324309 in words is "three hundred twenty-one billion, six hundred seventy-one million, three hundred twenty-four thousand, three hundred nine".