289815089 has 2 divisors, whose sum is σ = 289815090. Its totient is φ = 289815088.

The previous prime is 289815079. The next prime is 289815103. The reversal of 289815089 is 980518982.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 289680400 + 134689 = 17020^2 + 367^2 .

It is a cyclic number.

It is not a de Polignac number, because 289815089 - 2⁴ = 289815073 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (289815049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 144907544 + 144907545.

It is an arithmetic number, because the mean of its divisors is an integer number (144907545).

Almost surely, 2^289815089 is an apocalyptic number.

It is an amenable number.

289815089 is a deficient number, since it is larger than the sum of its proper divisors (1).

289815089 is an equidigital number, since it uses as much as digits as its factorization.

289815089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 414720, while the sum is 50.

The square root of 289815089 is about 17023.9563263068. The cubic root of 289815089 is about 661.7698815002.

The spelling of 289815089 in words is "two hundred eighty-nine million, eight hundred fifteen thousand, eighty-nine".