684144695 has 16 divisors (see below), whose sum is σ = 885339840. Its totient is φ = 504520704.

The previous prime is 684144679. The next prime is 684144697. The reversal of 684144695 is 596441486.

It is a happy number.

684144695 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 684144695 - 2⁴ = 684144679 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684144697) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43142 + ... + 56828.

It is an arithmetic number, because the mean of its divisors is an integer number (55333740).

Almost surely, 2^684144695 is an apocalyptic number.

684144695 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

684144695 is a deficient number, since it is larger than the sum of its proper divisors (201195145).

684144695 is a wasteful number, since it uses less digits than its factorization.

684144695 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14474.

The product of its digits is 829440, while the sum is 47.

The square root of 684144695 is about 26156.1597907644. The cubic root of 684144695 is about 881.1489361828.

The spelling of 684144695 in words is "six hundred eighty-four million, one hundred forty-four thousand, six hundred ninety-five".