289028231 has 2 divisors, whose sum is σ = 289028232. Its totient is φ = 289028230.

The previous prime is 289028227. The next prime is 289028261. The reversal of 289028231 is 132820982.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 289028231 - 2² = 289028227 is a prime.

It is a super-2 number, since 2×289028231² = 167074636629978722, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 289028191 and 289028200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (289028261) 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 as a sum of consecutive naturals, namely, 144514115 + 144514116.

It is an arithmetic number, because the mean of its divisors is an integer number (144514116).

Almost surely, 2^289028231 is an apocalyptic number.

289028231 is a deficient number, since it is larger than the sum of its proper divisors (1).

289028231 is an equidigital number, since it uses as much as digits as its factorization.

289028231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 289028231 is about 17000.8303032528. The cubic root of 289028231 is about 661.1704292817.

The spelling of 289028231 in words is "two hundred eighty-nine million, twenty-eight thousand, two hundred thirty-one".