684004143 has 4 divisors (see below), whose sum is σ = 912005528. Its totient is φ = 456002760.

The previous prime is 684004141. The next prime is 684004171. The reversal of 684004143 is 341400486.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 684004143 - 2¹ = 684004141 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 684004143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684004141) 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, 114000688 + ... + 114000693.

It is an arithmetic number, because the mean of its divisors is an integer number (228001382).

Almost surely, 2^684004143 is an apocalyptic number.

684004143 is a deficient number, since it is larger than the sum of its proper divisors (228001385).

684004143 is a wasteful number, since it uses less digits than its factorization.

684004143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228001384.

The product of its (nonzero) digits is 9216, while the sum is 30.

The square root of 684004143 is about 26153.4728669062. The cubic root of 684004143 is about 881.0885904069.

The spelling of 684004143 in words is "six hundred eighty-four million, four thousand, one hundred forty-three".