321768847 has 2 divisors, whose sum is σ = 321768848. Its totient is φ = 321768846.

The previous prime is 321768829. The next prime is 321768859. The reversal of 321768847 is 748867123.

It is a strong prime.

It is an emirp because it is prime and its reverse (748867123) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 321768847 - 2⁷ = 321768719 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 321768797 and 321768806.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321768047) 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 as a sum of consecutive naturals, namely, 160884423 + 160884424.

It is an arithmetic number, because the mean of its divisors is an integer number (160884424).

Almost surely, 2^321768847 is an apocalyptic number.

321768847 is a deficient number, since it is larger than the sum of its proper divisors (1).

321768847 is an equidigital number, since it uses as much as digits as its factorization.

321768847 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 451584, while the sum is 46.

The square root of 321768847 is about 17937.9164620644. The cubic root of 321768847 is about 685.2483493971.

The spelling of 321768847 in words is "three hundred twenty-one million, seven hundred sixty-eight thousand, eight hundred forty-seven".