289987556218441 has 3 divisors (see below), whose sum is σ = 289987573247463. Its totient is φ = 289987539189420.

The previous prime is 289987556218427. The next prime is 289987556218513. The reversal of 289987556218441 is 144812655789982.

The square root of 289987556218441 is 17029021.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 229438304022841 + 60549252195600 = 15147221^2 + 7781340^2 .

It is not a de Polignac number, because 289987556218441 - 2⁹ = 289987556217929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (289987556216441) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 8514511 + ... + 25543531.

It is an arithmetic number, because the mean of its divisors is an integer number (96662524415821).

Almost surely, 2^{289987556218441} is an apocalyptic number.

289987556218441 is the 17029021-st square number.

289987556218441 is the 8514511-st centered octagonal number.

It is an amenable number.

289987556218441 is a deficient number, since it is larger than the sum of its proper divisors (17029022).

289987556218441 is an frugal number, since it uses more digits than its factorization.

289987556218441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34058042 (or 17029021 counting only the distinct ones).

The product of its digits is 2786918400, while the sum is 79.

The spelling of 289987556218441 in words is "two hundred eighty-nine trillion, nine hundred eighty-seven billion, five hundred fifty-six million, two hundred eighteen thousand, four hundred forty-one".