289506068881 has 4 divisors (see below), whose sum is σ = 289978346932. Its totient is φ = 289033790832.

The previous prime is 289506068849. The next prime is 289506068909. The reversal of 289506068881 is 188860605982.

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 85345779600 + 204160289281 = 292140^2 + 451841^2 .

It is a cyclic number.

It is not a de Polignac number, because 289506068881 - 2⁵ = 289506068849 is a prime.

It is a super-2 number, since 2×289506068881² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (289506068081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 236138106 + ... + 236139331.

It is an arithmetic number, because the mean of its divisors is an integer number (72494586733).

Almost surely, 2^289506068881 is an apocalyptic number.

It is an amenable number.

289506068881 is a deficient number, since it is larger than the sum of its proper divisors (472278051).

289506068881 is an equidigital number, since it uses as much as digits as its factorization.

289506068881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 472278050.

The product of its (nonzero) digits is 13271040, while the sum is 61.

The spelling of 289506068881 in words is "two hundred eighty-nine billion, five hundred six million, sixty-eight thousand, eight hundred eighty-one".