684864747 has 32 divisors (see below), whose sum is σ = 1220595200. Its totient is φ = 370751904.

The previous prime is 684864673. The next prime is 684864769. The reversal of 684864747 is 747468486.

684864747 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 684864747 - 2¹⁰ = 684863723 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 684864693 and 684864702.

It is not an unprimeable number, because it can be changed into a prime (684864797) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 91768 + ... + 98949.

It is an arithmetic number, because the mean of its divisors is an integer number (38143600).

Almost surely, 2^684864747 is an apocalyptic number.

684864747 is a deficient number, since it is larger than the sum of its proper divisors (535730453).

684864747 is a wasteful number, since it uses less digits than its factorization.

684864747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190752 (or 190746 counting only the distinct ones).

The product of its digits is 7225344, while the sum is 54.

The square root of 684864747 is about 26169.9206532997. The cubic root of 684864747 is about 881.4579597940.

The spelling of 684864747 in words is "six hundred eighty-four million, eight hundred sixty-four thousand, seven hundred forty-seven".