6981329 has 2 divisors, whose sum is σ = 6981330. Its totient is φ = 6981328.

The previous prime is 6981323. The next prime is 6981349. The reversal of 6981329 is 9231896.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4494400 + 2486929 = 2120^2 + 1577^2 .

It is a cyclic number.

It is not a de Polignac number, because 6981329 - 2⁴ = 6981313 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 6981292 and 6981301.

It is not a weakly prime, because it can be changed into another prime (6981323) 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, 3490664 + 3490665.

It is an arithmetic number, because the mean of its divisors is an integer number (3490665).

Almost surely, 2^6981329 is an apocalyptic number.

It is an amenable number.

6981329 is a deficient number, since it is larger than the sum of its proper divisors (1).

6981329 is an equidigital number, since it uses as much as digits as its factorization.

6981329 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23328, while the sum is 38.

The square root of 6981329 is about 2642.2204677127. The cubic root of 6981329 is about 191.1228890369.

The spelling of 6981329 in words is "six million, nine hundred eighty-one thousand, three hundred twenty-nine".