684780725 has 12 divisors (see below), whose sum is σ = 886047456. Its totient is φ = 524005680.

The previous prime is 684780721. The next prime is 684780743. The reversal of 684780725 is 527087486.

684780725 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 684780725 - 2² = 684780721 is a prime.

It is a super-3 number, since 3×684780725³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 684780725.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684780721) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 594887 + ... + 596036.

It is an arithmetic number, because the mean of its divisors is an integer number (73837288).

Almost surely, 2^684780725 is an apocalyptic number.

It is an amenable number.

684780725 is a deficient number, since it is larger than the sum of its proper divisors (201266731).

684780725 is a wasteful number, since it uses less digits than its factorization.

684780725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1190956 (or 1190951 counting only the distinct ones).

The product of its (nonzero) digits is 752640, while the sum is 47.

The square root of 684780725 is about 26168.3152877674. The cubic root of 684780725 is about 881.4219113674.

The spelling of 684780725 in words is "six hundred eighty-four million, seven hundred eighty thousand, seven hundred twenty-five".