6749989 has 2 divisors, whose sum is σ = 6749990. Its totient is φ = 6749988.

The previous prime is 6749983. The next prime is 6750001. The reversal of 6749989 is 9899476.

6749989 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5832225 + 917764 = 2415^2 + 958^2 .

It is a cyclic number.

It is not a de Polignac number, because 6749989 - 2⁷ = 6749861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6749983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3374994 + 3374995.

It is an arithmetic number, because the mean of its divisors is an integer number (3374995).

Almost surely, 2^6749989 is an apocalyptic number.

It is an amenable number.

6749989 is a deficient number, since it is larger than the sum of its proper divisors (1).

6749989 is an equidigital number, since it uses as much as digits as its factorization.

6749989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 979776, while the sum is 52.

The square root of 6749989 is about 2598.0740944015. The cubic root of 6749989 is about 188.9880548239.

The spelling of 6749989 in words is "six million, seven hundred forty-nine thousand, nine hundred eighty-nine".