684516393289 has 4 divisors (see below), whose sum is σ = 684598962960. Its totient is φ = 684433823620.

The previous prime is 684516393277. The next prime is 684516393293. The reversal of 684516393289 is 982393615486.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 684516393289 - 2¹⁷ = 684516262217 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 684516393289.

It is not an unprimeable number, because it can be changed into a prime (684516393389) 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, 41272399 + ... + 41288980.

It is an arithmetic number, because the mean of its divisors is an integer number (171149740740).

Almost surely, 2^684516393289 is an apocalyptic number.

It is an amenable number.

684516393289 is a deficient number, since it is larger than the sum of its proper divisors (82569671).

684516393289 is an equidigital number, since it uses as much as digits as its factorization.

684516393289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82569670.

The product of its digits is 67184640, while the sum is 64.

The spelling of 684516393289 in words is "six hundred eighty-four billion, five hundred sixteen million, three hundred ninety-three thousand, two hundred eighty-nine".