289231247 has 2 divisors, whose sum is σ = 289231248. Its totient is φ = 289231246.

The previous prime is 289231231. The next prime is 289231273. The reversal of 289231247 is 742132982.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 289231247 - 2⁴ = 289231231 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 289231247.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (289231207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 144615623 + 144615624.

It is an arithmetic number, because the mean of its divisors is an integer number (144615624).

Almost surely, 2^289231247 is an apocalyptic number.

289231247 is a deficient number, since it is larger than the sum of its proper divisors (1).

289231247 is an equidigital number, since it uses as much as digits as its factorization.

289231247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 38.

The square root of 289231247 is about 17006.8000223440. The cubic root of 289231247 is about 661.3251970472.

The spelling of 289231247 in words is "two hundred eighty-nine million, two hundred thirty-one thousand, two hundred forty-seven".