289303681 has 4 divisors (see below), whose sum is σ = 299279700. Its totient is φ = 279327664.

The previous prime is 289303673. The next prime is 289303691. The reversal of 289303681 is 186303982.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 245862400 + 43441281 = 15680^2 + 6591^2 .

It is a cyclic number.

It is not a de Polignac number, because 289303681 - 2³ = 289303673 is a prime.

It is a super-2 number, since 2×289303681² = 167393239680299522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (289303601) 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 3 ways as a sum of consecutive naturals, for example, 4987966 + ... + 4988023.

It is an arithmetic number, because the mean of its divisors is an integer number (74819925).

Almost surely, 2^289303681 is an apocalyptic number.

It is an amenable number.

289303681 is a deficient number, since it is larger than the sum of its proper divisors (9976019).

289303681 is an equidigital number, since it uses as much as digits as its factorization.

289303681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9976018.

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 289303681 is about 17008.9294489689. The cubic root of 289303681 is about 661.3803990485.

The spelling of 289303681 in words is "two hundred eighty-nine million, three hundred three thousand, six hundred eighty-one".