289133941721 has 2 divisors, whose sum is σ = 289133941722. Its totient is φ = 289133941720.

The previous prime is 289133941717. The next prime is 289133941771. The reversal of 289133941721 is 127149331982.

It is a happy number.

It is an a-pointer prime, because the next prime (289133941771) can be obtained adding 289133941721 to its sum of digits (50).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 221780716096 + 67353225625 = 470936^2 + 259525^2 .

It is a cyclic number.

It is not a de Polignac number, because 289133941721 - 2² = 289133941717 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 289133941721.

It is not a weakly prime, because it can be changed into another prime (289133941771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 144566970860 + 144566970861.

It is an arithmetic number, because the mean of its divisors is an integer number (144566970861).

Almost surely, 2^289133941721 is an apocalyptic number.

It is an amenable number.

289133941721 is a deficient number, since it is larger than the sum of its proper divisors (1).

289133941721 is an equidigital number, since it uses as much as digits as its factorization.

289133941721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 653184, while the sum is 50.

The spelling of 289133941721 in words is "two hundred eighty-nine billion, one hundred thirty-three million, nine hundred forty-one thousand, seven hundred twenty-one".