684303206399 has 4 divisors (see below), whose sum is σ = 684440925840. Its totient is φ = 684165486960.

The previous prime is 684303206347. The next prime is 684303206441. The reversal of 684303206399 is 993602303486.

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 684303206399 - 2⁸ = 684303206143 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 684303206399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684303206309) 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, 68852267 + ... + 68862204.

It is an arithmetic number, because the mean of its divisors is an integer number (171110231460).

Almost surely, 2^684303206399 is an apocalyptic number.

684303206399 is a deficient number, since it is larger than the sum of its proper divisors (137719441).

684303206399 is a wasteful number, since it uses less digits than its factorization.

684303206399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137719440.

The product of its (nonzero) digits is 5038848, while the sum is 53.

The spelling of 684303206399 in words is "six hundred eighty-four billion, three hundred three million, two hundred six thousand, three hundred ninety-nine".