289649 has 4 divisors (see below), whose sum is σ = 292464. Its totient is φ = 286836.

The previous prime is 289643. The next prime is 289657. The reversal of 289649 is 946982.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 289649 - 2¹² = 285553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (289643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1247 + ... + 1460.

It is an arithmetic number, because the mean of its divisors is an integer number (73116).

2²⁸⁹⁶⁴⁹ is an apocalyptic number.

It is an amenable number.

289649 is a deficient number, since it is larger than the sum of its proper divisors (2815).

289649 is a wasteful number, since it uses less digits than its factorization.

289649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2814.

The product of its digits is 31104, while the sum is 38.

The square root of 289649 is about 538.1904867238. The cubic root of 289649 is about 66.1643440302.

The spelling of 289649 in words is "two hundred eighty-nine thousand, six hundred forty-nine".