289427 has 4 divisors (see below), whose sum is σ = 304680. Its totient is φ = 274176.

The previous prime is 289423. The next prime is 289439. The reversal of 289427 is 724982.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 289427 - 2² = 289423 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 289393 and 289402.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 289427.

It is not an unprimeable number, because it can be changed into a prime (289423) 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, 7598 + ... + 7635.

It is an arithmetic number, because the mean of its divisors is an integer number (76170).

2²⁸⁹⁴²⁷ is an apocalyptic number.

289427 is a deficient number, since it is larger than the sum of its proper divisors (15253).

289427 is a wasteful number, since it uses less digits than its factorization.

289427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15252.

The product of its digits is 8064, while the sum is 32.

The square root of 289427 is about 537.9842005115. The cubic root of 289427 is about 66.1474359350.

The spelling of 289427 in words is "two hundred eighty-nine thousand, four hundred twenty-seven".