9945845 has 16 divisors (see below), whose sum is σ = 14689920. Its totient is φ = 6295104.

The previous prime is 9945841. The next prime is 9945847. The reversal of 9945845 is 5485499.

It is a cyclic number.

It is not a de Polignac number, because 9945845 - 2² = 9945841 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 9945796 and 9945805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9945841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10475 + ... + 11384.

It is an arithmetic number, because the mean of its divisors is an integer number (918120).

Almost surely, 2^9945845 is an apocalyptic number.

It is an amenable number.

9945845 is a deficient number, since it is larger than the sum of its proper divisors (4744075).

9945845 is a wasteful number, since it uses less digits than its factorization.

9945845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21884.

The product of its digits is 259200, while the sum is 44.

The square root of 9945845 is about 3153.7033785694. The cubic root of 9945845 is about 215.0538534647.

The spelling of 9945845 in words is "nine million, nine hundred forty-five thousand, eight hundred forty-five".