289948863987 has 6 divisors (see below), whose sum is σ = 418815025772. Its totient is φ = 193299242652.

The previous prime is 289948863979. The next prime is 289948864021. The reversal of 289948863987 is 789368849982.

289948863987 is a `hidden beast` number, since 28 + 9 + 9 + 488 + 6 + 39 + 87 = 666.

It is not a de Polignac number, because 289948863987 - 2³ = 289948863979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (289948863907) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16108270213 + ... + 16108270230.

Almost surely, 2^289948863987 is an apocalyptic number.

289948863987 is a deficient number, since it is larger than the sum of its proper divisors (128866161785).

289948863987 is a wasteful number, since it uses less digits than its factorization.

289948863987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32216540449 (or 32216540446 counting only the distinct ones).

The product of its digits is 3009871872, while the sum is 81.

The spelling of 289948863987 in words is "two hundred eighty-nine billion, nine hundred forty-eight million, eight hundred sixty-three thousand, nine hundred eighty-seven".