684222708309 has 24 divisors (see below), whose sum is σ = 1061587644480. Its totient is φ = 390857572224.

The previous prime is 684222708293. The next prime is 684222708373. The reversal of 684222708309 is 903807222486.

It is a happy number.

It is not a de Polignac number, because 684222708309 - 2⁴ = 684222708293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684222708409) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 299329 + ... + 1207494.

It is an arithmetic number, because the mean of its divisors is an integer number (44232818520).

Almost surely, 2^684222708309 is an apocalyptic number.

It is an amenable number.

684222708309 is a deficient number, since it is larger than the sum of its proper divisors (377364936171).

684222708309 is a wasteful number, since it uses less digits than its factorization.

684222708309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1509929 (or 1509922 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 51.

The spelling of 684222708309 in words is "six hundred eighty-four billion, two hundred twenty-two million, seven hundred eight thousand, three hundred nine".