289916631721 has 8 divisors (see below), whose sum is σ = 307159253280. Its totient is φ = 272694977088.

The previous prime is 289916631671. The next prime is 289916631737. The reversal of 289916631721 is 127136619982.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 289916631721 - 2¹⁹ = 289916107433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (289916632721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5213251 + ... + 5268568.

It is an arithmetic number, because the mean of its divisors is an integer number (38394906660).

Almost surely, 2^289916631721 is an apocalyptic number.

It is an amenable number.

289916631721 is a deficient number, since it is larger than the sum of its proper divisors (17242621559).

289916631721 is a wasteful number, since it uses less digits than its factorization.

289916631721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10483463.

The product of its digits is 1959552, while the sum is 55.

The spelling of 289916631721 in words is "two hundred eighty-nine billion, nine hundred sixteen million, six hundred thirty-one thousand, seven hundred twenty-one".