684249343 has 4 divisors (see below), whose sum is σ = 686975688. Its totient is φ = 681523000.

The previous prime is 684249311. The next prime is 684249347. The reversal of 684249343 is 343942486.

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 684249343 - 2⁵ = 684249311 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 684249343.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684249347) 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, 1362796 + ... + 1363297.

It is an arithmetic number, because the mean of its divisors is an integer number (171743922).

Almost surely, 2^684249343 is an apocalyptic number.

684249343 is a deficient number, since it is larger than the sum of its proper divisors (2726345).

684249343 is a wasteful number, since it uses less digits than its factorization.

684249343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2726344.

The product of its digits is 497664, while the sum is 43.

The square root of 684249343 is about 26158.1601608370. The cubic root of 684249343 is about 881.1938612663.

The spelling of 684249343 in words is "six hundred eighty-four million, two hundred forty-nine thousand, three hundred forty-three".