289472321 has 2 divisors, whose sum is σ = 289472322. Its totient is φ = 289472320.

The previous prime is 289472303. The next prime is 289472383. The reversal of 289472321 is 123274982.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 202777600 + 86694721 = 14240^2 + 9311^2 .

It is a cyclic number.

It is not a de Polignac number, because 289472321 - 2⁶ = 289472257 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (289472021) 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, 144736160 + 144736161.

It is an arithmetic number, because the mean of its divisors is an integer number (144736161).

Almost surely, 2^289472321 is an apocalyptic number.

It is an amenable number.

289472321 is a deficient number, since it is larger than the sum of its proper divisors (1).

289472321 is an equidigital number, since it uses as much as digits as its factorization.

289472321 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 289472321 is about 17013.8861228116. The cubic root of 289472321 is about 661.5088840200.

The spelling of 289472321 in words is "two hundred eighty-nine million, four hundred seventy-two thousand, three hundred twenty-one".