289119921 has 4 divisors (see below), whose sum is σ = 385493232. Its totient is φ = 192746612.

The previous prime is 289119899. The next prime is 289119977. The reversal of 289119921 is 129911982.

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 289119921 - 2¹³ = 289111729 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (289114921) 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, 48186651 + ... + 48186656.

It is an arithmetic number, because the mean of its divisors is an integer number (96373308).

Almost surely, 2^289119921 is an apocalyptic number.

It is an amenable number.

289119921 is a deficient number, since it is larger than the sum of its proper divisors (96373311).

289119921 is an equidigital number, since it uses as much as digits as its factorization.

289119921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96373310.

The product of its digits is 23328, while the sum is 42.

The square root of 289119921 is about 17003.5267224185. The cubic root of 289119921 is about 661.2403374553.

The spelling of 289119921 in words is "two hundred eighty-nine million, one hundred nineteen thousand, nine hundred twenty-one".