289689563 has 4 divisors (see below), whose sum is σ = 289754520. Its totient is φ = 289624608.

The previous prime is 289689551. The next prime is 289689619. The reversal of 289689563 is 365986982.

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 289689563 - 2¹⁴ = 289673179 is a prime.

It is a super-2 number, since 2×289689563² = 167840085822261938, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 289689499 and 289689508.

It is not an unprimeable number, because it can be changed into a prime (289688563) 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, 25253 + ... + 34886.

It is an arithmetic number, because the mean of its divisors is an integer number (72438630).

Almost surely, 2^289689563 is an apocalyptic number.

289689563 is a deficient number, since it is larger than the sum of its proper divisors (64957).

289689563 is an equidigital number, since it uses as much as digits as its factorization.

289689563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64956.

The product of its digits is 5598720, while the sum is 56.

The square root of 289689563 is about 17020.2691811851. The cubic root of 289689563 is about 661.6743247983.

The spelling of 289689563 in words is "two hundred eighty-nine million, six hundred eighty-nine thousand, five hundred sixty-three".