7989745 has 8 divisors (see below), whose sum is σ = 10151784. Its totient is φ = 6015744.

The previous prime is 7989713. The next prime is 7989749. The reversal of 7989745 is 5479897.

It is a happy number.

7989745 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 4112784 + 3876961 = 2028^2 + 1969^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7989745 - 2⁵ = 7989713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7989749) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46914 + ... + 47083.

It is an arithmetic number, because the mean of its divisors is an integer number (1268973).

Almost surely, 2^7989745 is an apocalyptic number.

It is an amenable number.

7989745 is a deficient number, since it is larger than the sum of its proper divisors (2162039).

7989745 is a wasteful number, since it uses less digits than its factorization.

7989745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94019.

The product of its digits is 635040, while the sum is 49.

The square root of 7989745 is about 2826.6136984031. The cubic root of 7989745 is about 199.9145051250.

The spelling of 7989745 in words is "seven million, nine hundred eighty-nine thousand, seven hundred forty-five".