321474745364789 has 2 divisors, whose sum is σ = 321474745364790. Its totient is φ = 321474745364788.

The previous prime is 321474745364681. The next prime is 321474745364791. The reversal of 321474745364789 is 987463547474123.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 315995597350225 + 5479148014564 = 17776265^2 + 2340758^2 .

It is a cyclic number.

It is not a de Polignac number, because 321474745364789 - 2¹² = 321474745360693 is a prime.

Together with 321474745364791, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321474745364089) 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, 160737372682394 + 160737372682395.

It is an arithmetic number, because the mean of its divisors is an integer number (160737372682395).

Almost surely, 2^{321474745364789} is an apocalyptic number.

It is an amenable number.

321474745364789 is a deficient number, since it is larger than the sum of its proper divisors (1).

321474745364789 is an equidigital number, since it uses as much as digits as its factorization.

321474745364789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3413975040, while the sum is 74.

The spelling of 321474745364789 in words is "three hundred twenty-one trillion, four hundred seventy-four billion, seven hundred forty-five million, three hundred sixty-four thousand, seven hundred eighty-nine".