8969945 has 4 divisors (see below), whose sum is σ = 10763940. Its totient is φ = 7175952.

The previous prime is 8969923. The next prime is 8969959. The reversal of 8969945 is 5499698.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5499698 = 2 ⋅2749849.

It can be written as a sum of positive squares in 2 ways, for example, as 5053504 + 3916441 = 2248^2 + 1979^2 .

It is a cyclic number.

It is not a de Polignac number, because 8969945 - 2⁸ = 8969689 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 8969893 and 8969902.

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, 896990 + ... + 896999.

It is an arithmetic number, because the mean of its divisors is an integer number (2690985).

Almost surely, 2^8969945 is an apocalyptic number.

It is an amenable number.

8969945 is a deficient number, since it is larger than the sum of its proper divisors (1793995).

8969945 is a wasteful number, since it uses less digits than its factorization.

8969945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1793994.

The product of its digits is 699840, while the sum is 50.

The square root of 8969945 is about 2994.9866443776. The cubic root of 8969945 is about 207.7765799374.

The spelling of 8969945 in words is "eight million, nine hundred sixty-nine thousand, nine hundred forty-five".