289979991881 has 4 divisors (see below), whose sum is σ = 292795331712. Its totient is φ = 287164652052.

The previous prime is 289979991841. The next prime is 289979991887. The reversal of 289979991881 is 188199979982.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 289979991881 - 2⁶ = 289979991817 is a prime.

It is a super-3 number, since 3×289979991881³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 289979991796 and 289979991805.

It is not an unprimeable number, because it can be changed into a prime (289979991887) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1407669761 + ... + 1407669966.

It is an arithmetic number, because the mean of its divisors is an integer number (73198832928).

Almost surely, 2^289979991881 is an apocalyptic number.

It is an amenable number.

289979991881 is a deficient number, since it is larger than the sum of its proper divisors (2815339831).

289979991881 is a wasteful number, since it uses less digits than its factorization.

289979991881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2815339830.

The product of its digits is 423263232, while the sum is 80.

The spelling of 289979991881 in words is "two hundred eighty-nine billion, nine hundred seventy-nine million, nine hundred ninety-one thousand, eight hundred eighty-one".