9992945 has 4 divisors (see below), whose sum is σ = 11991540. Its totient is φ = 7994352.

The previous prime is 9992933. The next prime is 9992963. The reversal of 9992945 is 5492999.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5492999 = 743 ⋅7393.

It can be written as a sum of positive squares in 2 ways, for example, as 3500641 + 6492304 = 1871^2 + 2548^2 .

It is a cyclic number.

It is not a de Polignac number, because 9992945 - 2¹⁸ = 9730801 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9992945.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 999290 + ... + 999299.

It is an arithmetic number, because the mean of its divisors is an integer number (2997885).

Almost surely, 2^9992945 is an apocalyptic number.

It is an amenable number.

9992945 is a deficient number, since it is larger than the sum of its proper divisors (1998595).

9992945 is a wasteful number, since it uses less digits than its factorization.

9992945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1998594.

The product of its digits is 262440, while the sum is 47.

The square root of 9992945 is about 3161.1619699092. The cubic root of 9992945 is about 215.3927919613.

The spelling of 9992945 in words is "nine million, nine hundred ninety-two thousand, nine hundred forty-five".