289489921 has 8 divisors (see below), whose sum is σ = 330952064. Its totient is φ = 248054400.

The previous prime is 289489913. The next prime is 289489943. The reversal of 289489921 is 129984982.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 289489921 - 2³ = 289489913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (289481921) 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 7 ways as a sum of consecutive naturals, for example, 30481 + ... + 38833.

It is an arithmetic number, because the mean of its divisors is an integer number (41369008).

Almost surely, 2^289489921 is an apocalyptic number.

It is an amenable number.

289489921 is a deficient number, since it is larger than the sum of its proper divisors (41462143).

289489921 is an equidigital number, since it uses as much as digits as its factorization.

289489921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13311.

The product of its digits is 746496, while the sum is 52.

The square root of 289489921 is about 17014.4033395238. The cubic root of 289489921 is about 661.5222903915.

The spelling of 289489921 in words is "two hundred eighty-nine million, four hundred eighty-nine thousand, nine hundred twenty-one".