289222889 has 4 divisors (see below), whose sum is σ = 291876420. Its totient is φ = 286569360.

The previous prime is 289222877. The next prime is 289222891. The reversal of 289222889 is 988222982.

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 176013289 + 113209600 = 13267^2 + 10640^2 .

It is a cyclic number.

It is not a de Polignac number, because 289222889 - 2⁴ = 289222873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (289222849) 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, 1326602 + ... + 1326819.

It is an arithmetic number, because the mean of its divisors is an integer number (72969105).

Almost surely, 2^289222889 is an apocalyptic number.

It is an amenable number.

289222889 is a deficient number, since it is larger than the sum of its proper divisors (2653531).

289222889 is a wasteful number, since it uses less digits than its factorization.

289222889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2653530.

The product of its digits is 663552, while the sum is 50.

The square root of 289222889 is about 17006.5542953298. The cubic root of 289222889 is about 661.3188268166.

The spelling of 289222889 in words is "two hundred eighty-nine million, two hundred twenty-two thousand, eight hundred eighty-nine".