289781423 has 4 divisors (see below), whose sum is σ = 292650648. Its totient is φ = 286912200.

The previous prime is 289781413. The next prime is 289781431. The reversal of 289781423 is 324187982.

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 289781423 - 2¹⁰ = 289780399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (289781413) 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, 1434461 + ... + 1434662.

It is an arithmetic number, because the mean of its divisors is an integer number (73162662).

Almost surely, 2^289781423 is an apocalyptic number.

289781423 is a deficient number, since it is larger than the sum of its proper divisors (2869225).

289781423 is a wasteful number, since it uses less digits than its factorization.

289781423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2869224.

The product of its digits is 193536, while the sum is 44.

The square root of 289781423 is about 17022.9675145082. The cubic root of 289781423 is about 661.7442559566.

The spelling of 289781423 in words is "two hundred eighty-nine million, seven hundred eighty-one thousand, four hundred twenty-three".