289881133 has 2 divisors, whose sum is σ = 289881134. Its totient is φ = 289881132.

The previous prime is 289881131. The next prime is 289881149. The reversal of 289881133 is 331188982.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 232318564 + 57562569 = 15242^2 + 7587^2 .

It is a cyclic number.

It is not a de Polignac number, because 289881133 - 2¹ = 289881131 is a prime.

Together with 289881131, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 289881133.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (289881131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 144940566 + 144940567.

It is an arithmetic number, because the mean of its divisors is an integer number (144940567).

Almost surely, 2^289881133 is an apocalyptic number.

It is an amenable number.

289881133 is a deficient number, since it is larger than the sum of its proper divisors (1).

289881133 is an equidigital number, since it uses as much as digits as its factorization.

289881133 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82944, while the sum is 43.

The square root of 289881133 is about 17025.8959529301. The cubic root of 289881133 is about 661.8201464360.

The spelling of 289881133 in words is "two hundred eighty-nine million, eight hundred eighty-one thousand, one hundred thirty-three".