6981859 has 2 divisors, whose sum is σ = 6981860. Its totient is φ = 6981858.

The previous prime is 6981853. The next prime is 6981889. The reversal of 6981859 is 9581896.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6981859 - 2⁷ = 6981731 is a prime.

It is not a weakly prime, because it can be changed into another prime (6981853) 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, 3490929 + 3490930.

It is an arithmetic number, because the mean of its divisors is an integer number (3490930).

Almost surely, 2^6981859 is an apocalyptic number.

6981859 is a deficient number, since it is larger than the sum of its proper divisors (1).

6981859 is an equidigital number, since it uses as much as digits as its factorization.

6981859 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 155520, while the sum is 46.

The square root of 6981859 is about 2642.3207602409. The cubic root of 6981859 is about 191.1277253924.

The spelling of 6981859 in words is "six million, nine hundred eighty-one thousand, eight hundred fifty-nine".