289745 has 8 divisors (see below), whose sum is σ = 350784. Its totient is φ = 229744.

The previous prime is 289741. The next prime is 289759. The reversal of 289745 is 547982.

It is a happy number.

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 289745 - 2² = 289741 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (289741) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 662 + ... + 1008.

It is an arithmetic number, because the mean of its divisors is an integer number (43848).

2²⁸⁹⁷⁴⁵ is an apocalyptic number.

It is an amenable number.

289745 is a deficient number, since it is larger than the sum of its proper divisors (61039).

289745 is a wasteful number, since it uses less digits than its factorization.

289745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 519.

The product of its digits is 20160, while the sum is 35.

The square root of 289745 is about 538.2796670877. The cubic root of 289745 is about 66.1716529633.

The spelling of 289745 in words is "two hundred eighty-nine thousand, seven hundred forty-five".