289930243 has 4 divisors (see below), whose sum is σ = 290314000. Its totient is φ = 289546488.

The previous prime is 289930241. The next prime is 289930283. The reversal of 289930243 is 342039982.

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 289930243 - 2¹ = 289930241 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 289930196 and 289930205.

It is not an unprimeable number, because it can be changed into a prime (289930241) 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, 190743 + ... + 192256.

It is an arithmetic number, because the mean of its divisors is an integer number (72578500).

Almost surely, 2^289930243 is an apocalyptic number.

289930243 is a deficient number, since it is larger than the sum of its proper divisors (383757).

289930243 is an equidigital number, since it uses as much as digits as its factorization.

289930243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383756.

The product of its (nonzero) digits is 93312, while the sum is 40.

The square root of 289930243 is about 17027.3381067036. The cubic root of 289930243 is about 661.8575182509.

The spelling of 289930243 in words is "two hundred eighty-nine million, nine hundred thirty thousand, two hundred forty-three".