289045945 has 8 divisors (see below), whose sum is σ = 361935936. Its totient is φ = 221182896.

The previous prime is 289045943. The next prime is 289045969. The reversal of 289045945 is 549540982.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 289045945 - 2¹ = 289045943 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 289045895 and 289045904.

It is not an unprimeable number, because it can be changed into a prime (289045943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1256607 + ... + 1256836.

It is an arithmetic number, because the mean of its divisors is an integer number (45241992).

Almost surely, 2^289045945 is an apocalyptic number.

It is an amenable number.

289045945 is a deficient number, since it is larger than the sum of its proper divisors (72889991).

289045945 is a wasteful number, since it uses less digits than its factorization.

289045945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2513471.

The product of its (nonzero) digits is 518400, while the sum is 46.

The square root of 289045945 is about 17001.3512698256. The cubic root of 289045945 is about 661.1839363056.

The spelling of 289045945 in words is "two hundred eighty-nine million, forty-five thousand, nine hundred forty-five".