289830091 has 4 divisors (see below), whose sum is σ = 289936800. Its totient is φ = 289723384.

The previous prime is 289830077. The next prime is 289830097. The reversal of 289830091 is 190038982.

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 289830091 - 2¹⁷ = 289699019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (289830097) 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, 49171 + ... + 54748.

It is an arithmetic number, because the mean of its divisors is an integer number (72484200).

Almost surely, 2^289830091 is an apocalyptic number.

289830091 is a deficient number, since it is larger than the sum of its proper divisors (106709).

289830091 is a wasteful number, since it uses less digits than its factorization.

289830091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106708.

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 289830091 is about 17024.3969349872. The cubic root of 289830091 is about 661.7812999308.

The spelling of 289830091 in words is "two hundred eighty-nine million, eight hundred thirty thousand, ninety-one".