289643806343 has 4 divisors (see below), whose sum is σ = 292301089080. Its totient is φ = 286986523608.

The previous prime is 289643806307. The next prime is 289643806373. The reversal of 289643806343 is 343608346982.

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 289643806343 - 2¹⁸ = 289643544199 is a prime.

It is a super-2 number, since 2×289643806343² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (289643806373) 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, 1328641205 + ... + 1328641422.

It is an arithmetic number, because the mean of its divisors is an integer number (73075272270).

Almost surely, 2^289643806343 is an apocalyptic number.

289643806343 is a deficient number, since it is larger than the sum of its proper divisors (2657282737).

289643806343 is a wasteful number, since it uses less digits than its factorization.

289643806343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2657282736.

The product of its (nonzero) digits is 17915904, while the sum is 56.

The spelling of 289643806343 in words is "two hundred eighty-nine billion, six hundred forty-three million, eight hundred six thousand, three hundred forty-three".