289057 has 4 divisors (see below), whose sum is σ = 290836. Its totient is φ = 287280.

The previous prime is 289049. The next prime is 289063. The reversal of 289057 is 750982.

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

It can be written as a sum of positive squares in 2 ways, for example, as 22801 + 266256 = 151^2 + 516^2 .

It is a cyclic number.

It is not a de Polignac number, because 289057 - 2³ = 289049 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (289067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 618 + ... + 979.

It is an arithmetic number, because the mean of its divisors is an integer number (72709).

2²⁸⁹⁰⁵⁷ is an apocalyptic number.

It is an amenable number.

289057 is a deficient number, since it is larger than the sum of its proper divisors (1779).

289057 is a wasteful number, since it uses less digits than its factorization.

289057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1778.

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 289057 is about 537.6402142697. The cubic root of 289057 is about 66.1192365525.

The spelling of 289057 in words is "two hundred eighty-nine thousand, fifty-seven".