321116909 has 8 divisors (see below), whose sum is σ = 325643520. Its totient is φ = 316602000.

The previous prime is 321116849. The next prime is 321116911. The reversal of 321116909 is 909611123.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-321116909 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 (321116989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62384 + ... + 67334.

It is an arithmetic number, because the mean of its divisors is an integer number (40705440).

Almost surely, 2^321116909 is an apocalyptic number.

It is an amenable number.

321116909 is a deficient number, since it is larger than the sum of its proper divisors (4526611).

321116909 is an equidigital number, since it uses as much as digits as its factorization.

321116909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5851.

The product of its (nonzero) digits is 2916, while the sum is 32.

The square root of 321116909 is about 17919.7351821951. The cubic root of 321116909 is about 684.7852410751.

The spelling of 321116909 in words is "three hundred twenty-one million, one hundred sixteen thousand, nine hundred nine".