289766081 has 6 divisors (see below), whose sum is σ = 318503346. Its totient is φ = 263423600.

The previous prime is 289766069. The next prime is 289766107. The reversal of 289766081 is 180667982.

It can be written as a sum of positive squares in only one way, i.e., 168766081 + 121000000 = 12991^2 + 11000^2 .

It is not a de Polignac number, because 289766081 - 2¹⁴ = 289749697 is a prime.

It is a super-2 number, since 2×289766081² = 167928763396197122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (289766011) 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 in 5 ways as a sum of consecutive naturals, for example, 1197260 + ... + 1197501.

It is an arithmetic number, because the mean of its divisors is an integer number (53083891).

Almost surely, 2^289766081 is an apocalyptic number.

It is an amenable number.

289766081 is a deficient number, since it is larger than the sum of its proper divisors (28737265).

289766081 is a wasteful number, since it uses less digits than its factorization.

289766081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2394783 (or 2394772 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 47.

The square root of 289766081 is about 17022.5168820595. The cubic root of 289766081 is about 661.7325774307.

The spelling of 289766081 in words is "two hundred eighty-nine million, seven hundred sixty-six thousand, eighty-one".