9975945 has 16 divisors (see below), whose sum is σ = 18241920. Its totient is φ = 4560384.

The previous prime is 9975943. The next prime is 9975989. The reversal of 9975945 is 5495799.

9975945 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9975945 - 2¹ = 9975943 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 9975894 and 9975903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9975943) 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, 47400 + ... + 47609.

It is an arithmetic number, because the mean of its divisors is an integer number (1140120).

Almost surely, 2^9975945 is an apocalyptic number.

It is an amenable number.

9975945 is a deficient number, since it is larger than the sum of its proper divisors (8265975).

9975945 is a wasteful number, since it uses less digits than its factorization.

9975945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95024.

The product of its digits is 510300, while the sum is 48.

The square root of 9975945 is about 3158.4719406700. The cubic root of 9975945 is about 215.2705805464.

The spelling of 9975945 in words is "nine million, nine hundred seventy-five thousand, nine hundred forty-five".