289668610813 has 4 divisors (see below), whose sum is σ = 290390976828. Its totient is φ = 288946244800.

The previous prime is 289668610807. The next prime is 289668610817. The reversal of 289668610813 is 318016866982.

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 230287693689 + 59380917124 = 479883^2 + 243682^2 .

It is a cyclic number.

It is not a de Polignac number, because 289668610813 - 2¹³ = 289668602621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (289668610817) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 361182406 + ... + 361183207.

It is an arithmetic number, because the mean of its divisors is an integer number (72597744207).

Almost surely, 2^289668610813 is an apocalyptic number.

It is an amenable number.

289668610813 is a deficient number, since it is larger than the sum of its proper divisors (722366015).

289668610813 is an equidigital number, since it uses as much as digits as its factorization.

289668610813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 722366014.

The product of its (nonzero) digits is 5971968, while the sum is 58.

The spelling of 289668610813 in words is "two hundred eighty-nine billion, six hundred sixty-eight million, six hundred ten thousand, eight hundred thirteen".