289874856609 has 12 divisors (see below), whose sum is σ = 450916443796. Its totient is φ = 178384527072.

The previous prime is 289874856529. The next prime is 289874856611. The reversal of 289874856609 is 906658478982.

289874856609 is a `hidden beast` number, since 2 + 8 + 9 + 8 + 7 + 4 + 8 + 5 + 6 + 609 = 666.

289874856609 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 46495434384 + 243379422225 = 215628^2 + 493335^2 .

It is not a de Polignac number, because 289874856609 - 2²¹ = 289872759457 is a prime.

It is not an unprimeable number, because it can be changed into a prime (289874856709) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1238781322 + ... + 1238781555.

Almost surely, 2^289874856609 is an apocalyptic number.

It is an amenable number.

289874856609 is a deficient number, since it is larger than the sum of its proper divisors (161041587187).

289874856609 is a wasteful number, since it uses less digits than its factorization.

289874856609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2477562896 (or 2477562893 counting only the distinct ones).

The product of its (nonzero) digits is 418037760, while the sum is 72.

The spelling of 289874856609 in words is "two hundred eighty-nine billion, eight hundred seventy-four million, eight hundred fifty-six thousand, six hundred nine".