289188049 has 4 divisors (see below), whose sum is σ = 289224100. Its totient is φ = 289152000.

The previous prime is 289188023. The next prime is 289188073. The reversal of 289188049 is 940881982.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 940881982 = 2 ⋅470440991.

It can be written as a sum of positive squares in 2 ways, for example, as 137898049 + 151290000 = 11743^2 + 12300^2 .

It is a cyclic number.

It is not a de Polignac number, because 289188049 - 2¹³ = 289179857 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 289187993 and 289188011.

It is not an unprimeable number, because it can be changed into a prime (289188079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49 + ... + 24049.

It is an arithmetic number, because the mean of its divisors is an integer number (72306025).

Almost surely, 2^289188049 is an apocalyptic number.

It is an amenable number.

289188049 is a deficient number, since it is larger than the sum of its proper divisors (36051).

289188049 is a wasteful number, since it uses less digits than its factorization.

289188049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36050.

The product of its (nonzero) digits is 331776, while the sum is 49.

The square root of 289188049 is about 17005.5299535181. The cubic root of 289188049 is about 661.2922714343.

The spelling of 289188049 in words is "two hundred eighty-nine million, one hundred eighty-eight thousand, forty-nine".