9739945 has 4 divisors (see below), whose sum is σ = 11687940. Its totient is φ = 7791952.

The previous prime is 9739937. The next prime is 9739949. The reversal of 9739945 is 5499379.

9739945 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1149184 + 8590761 = 1072^2 + 2931^2 .

It is a cyclic number.

It is not a de Polignac number, because 9739945 - 2³ = 9739937 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 9739895 and 9739904.

It is not an unprimeable number, because it can be changed into a prime (9739949) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 973990 + ... + 973999.

It is an arithmetic number, because the mean of its divisors is an integer number (2921985).

Almost surely, 2^9739945 is an apocalyptic number.

It is an amenable number.

9739945 is a deficient number, since it is larger than the sum of its proper divisors (1947995).

9739945 is a wasteful number, since it uses less digits than its factorization.

9739945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1947994.

The product of its digits is 306180, while the sum is 46.

The square root of 9739945 is about 3120.8884952846. Note that the first 3 decimals coincide. The cubic root of 9739945 is about 213.5594702216.

The spelling of 9739945 in words is "nine million, seven hundred thirty-nine thousand, nine hundred forty-five".