289966 has 4 divisors (see below), whose sum is σ = 434952. Its totient is φ = 144982.

The previous prime is 289957. The next prime is 289967. The reversal of 289966 is 669982.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 669982 = 2 ⋅334991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (289967) by changing a digit.

289966 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72490 + ... + 72493.

It is an arithmetic number, because the mean of its divisors is an integer number (108738).

2²⁸⁹⁹⁶⁶ is an apocalyptic number.

289966 is a deficient number, since it is larger than the sum of its proper divisors (144986).

289966 is a wasteful number, since it uses less digits than its factorization.

289966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144985.

The product of its digits is 46656, while the sum is 40.

The square root of 289966 is about 538.4849115806. The cubic root of 289966 is about 66.1884726021.

The spelling of 289966 in words is "two hundred eighty-nine thousand, nine hundred sixty-six".