289787099897 has 8 divisors (see below), whose sum is σ = 298361391432. Its totient is φ = 281251872000.

The previous prime is 289787099891. The next prime is 289787099939. The reversal of 289787099897 is 798990787982.

It can be written as a sum of positive squares in 4 ways, for example, as 100495974121 + 189291125776 = 317011^2 + 435076^2 .

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 289787099897 - 2¹⁰ = 289787098873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (289787099891) 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, 9750854 + ... + 9780527.

It is an arithmetic number, because the mean of its divisors is an integer number (37295173929).

Almost surely, 2^289787099897 is an apocalyptic number.

It is an amenable number.

289787099897 is a deficient number, since it is larger than the sum of its proper divisors (8574291535).

289787099897 is a wasteful number, since it uses less digits than its factorization.

289787099897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19531819.

The product of its (nonzero) digits is 2304433152, while the sum is 83.

The spelling of 289787099897 in words is "two hundred eighty-nine billion, seven hundred eighty-seven million, ninety-nine thousand, eight hundred ninety-seven".