289859958981 has 6 divisors (see below), whose sum is σ = 418686607430. Its totient is φ = 193239972648.

The previous prime is 289859958929. The next prime is 289859959073. The reversal of 289859958981 is 189859958982.

It is a happy number.

289859958981 is a `hidden beast` number, since 28 + 9 + 8 + 5 + 9 + 9 + 589 + 8 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 155046150081 + 134813808900 = 393759^2 + 367170^2 .

It is not a de Polignac number, because 289859958981 - 2¹⁸ = 289859696837 is a prime.

It is a super-2 number, since 2×289859958981² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 289859958981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (289859958901) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16103331046 + ... + 16103331063.

Almost surely, 2^289859958981 is an apocalyptic number.

It is an amenable number.

289859958981 is a deficient number, since it is larger than the sum of its proper divisors (128826648449).

289859958981 is a wasteful number, since it uses less digits than its factorization.

289859958981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32206662115 (or 32206662112 counting only the distinct ones).

The product of its digits is 1343692800, while the sum is 81.

Subtracting from 289859958981 its reverse (189859958982), we obtain a palindrome (99999999999).

The spelling of 289859958981 in words is "two hundred eighty-nine billion, eight hundred fifty-nine million, nine hundred fifty-eight thousand, nine hundred eighty-one".