6998489609 has 2 divisors, whose sum is σ = 6998489610. Its totient is φ = 6998489608.

The previous prime is 6998489549. The next prime is 6998489689. The reversal of 6998489609 is 9069848996.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3794929609 + 3203560000 = 61603^2 + 56600^2 .

It is a cyclic number.

It is not a de Polignac number, because 6998489609 - 2⁸ = 6998489353 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (6998489689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3499244804 + 3499244805.

It is an arithmetic number, because the mean of its divisors is an integer number (3499244805).

Almost surely, 2^6998489609 is an apocalyptic number.

It is an amenable number.

6998489609 is a deficient number, since it is larger than the sum of its proper divisors (1).

6998489609 is an equidigital number, since it uses as much as digits as its factorization.

6998489609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60466176, while the sum is 68.

The square root of 6998489609 is about 83656.9758537804. The cubic root of 6998489609 is about 1912.7935883975.

The spelling of 6998489609 in words is "six billion, nine hundred ninety-eight million, four hundred eighty-nine thousand, six hundred nine".