289578241 has 2 divisors, whose sum is σ = 289578242. Its totient is φ = 289578240.

The previous prime is 289578239. The next prime is 289578269. The reversal of 289578241 is 142875982.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 289136016 + 442225 = 17004^2 + 665^2 .

It is a cyclic number.

It is not a de Polignac number, because 289578241 - 2¹ = 289578239 is a prime.

Together with 289578239, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 289578191 and 289578200.

It is not a weakly prime, because it can be changed into another prime (289578281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 144789120 + 144789121.

It is an arithmetic number, because the mean of its divisors is an integer number (144789121).

Almost surely, 2^289578241 is an apocalyptic number.

It is an amenable number.

289578241 is a deficient number, since it is larger than the sum of its proper divisors (1).

289578241 is an equidigital number, since it uses as much as digits as its factorization.

289578241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 322560, while the sum is 46.

The square root of 289578241 is about 17016.9985896456. The cubic root of 289578241 is about 661.5895577973.

The spelling of 289578241 in words is "two hundred eighty-nine million, five hundred seventy-eight thousand, two hundred forty-one".