289658881 has 2 divisors, whose sum is σ = 289658882. Its totient is φ = 289658880.

The previous prime is 289658851. The next prime is 289658911. The reversal of 289658881 is 188856982.

It is a balanced prime because it is at equal distance from previous prime (289658851) and next prime (289658911).

It can be written as a sum of positive squares in only one way, i.e., 229068225 + 60590656 = 15135^2 + 7784^2 .

It is a cyclic number.

It is not a de Polignac number, because 289658881 - 2²³ = 281270273 is a prime.

It is a super-2 number, since 2×289658881² = 167804534684344322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (289658851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 144829440 + 144829441.

It is an arithmetic number, because the mean of its divisors is an integer number (144829441).

Almost surely, 2^289658881 is an apocalyptic number.

It is an amenable number.

289658881 is a deficient number, since it is larger than the sum of its proper divisors (1).

289658881 is an equidigital number, since it uses as much as digits as its factorization.

289658881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2211840, while the sum is 55.

The square root of 289658881 is about 17019.3678202218. The cubic root of 289658881 is about 661.6509639194.

The spelling of 289658881 in words is "two hundred eighty-nine million, six hundred fifty-eight thousand, eight hundred eighty-one".