289139611 has 4 divisors (see below), whose sum is σ = 295863832. Its totient is φ = 282415392.

The previous prime is 289139603. The next prime is 289139623. The reversal of 289139611 is 116931982.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 289139611 - 2³ = 289139603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (289139651) 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, 3362046 + ... + 3362131.

It is an arithmetic number, because the mean of its divisors is an integer number (73965958).

Almost surely, 2^289139611 is an apocalyptic number.

289139611 is a deficient number, since it is larger than the sum of its proper divisors (6724221).

289139611 is an equidigital number, since it uses as much as digits as its factorization.

289139611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6724220.

The product of its digits is 23328, while the sum is 40.

The square root of 289139611 is about 17004.1057100925. The cubic root of 289139611 is about 661.2553479818.

The spelling of 289139611 in words is "two hundred eighty-nine million, one hundred thirty-nine thousand, six hundred eleven".