321947 has 2 divisors, whose sum is σ = 321948. Its totient is φ = 321946.

The previous prime is 321911. The next prime is 321949. The reversal of 321947 is 749123.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 321947 - 2¹⁰ = 320923 is a prime.

Together with 321949, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 321947.

It is not a weakly prime, because it can be changed into another prime (321949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160973 + 160974.

It is an arithmetic number, because the mean of its divisors is an integer number (160974).

2³²¹⁹⁴⁷ is an apocalyptic number.

321947 is a deficient number, since it is larger than the sum of its proper divisors (1).

321947 is an equidigital number, since it uses as much as digits as its factorization.

321947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1512, while the sum is 26.

The square root of 321947 is about 567.4037363289. The cubic root of 321947 is about 68.5374792678.

The spelling of 321947 in words is "three hundred twenty-one thousand, nine hundred forty-seven".