684844725 has 12 divisors (see below), whose sum is σ = 1132276736. Its totient is φ = 365250480.

The previous prime is 684844697. The next prime is 684844753. The reversal of 684844725 is 527448486.

It is an interprime number because it is at equal distance from previous prime (684844697) and next prime (684844753).

It is not a de Polignac number, because 684844725 - 2¹⁸ = 684582581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4565557 + ... + 4565706.

Almost surely, 2^684844725 is an apocalyptic number.

It is an amenable number.

684844725 is a deficient number, since it is larger than the sum of its proper divisors (447432011).

684844725 is a wasteful number, since it uses less digits than its factorization.

684844725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9131276 (or 9131271 counting only the distinct ones).

The product of its digits is 1720320, while the sum is 48.

The square root of 684844725 is about 26169.5381120875. The cubic root of 684844725 is about 881.4493699114.

The spelling of 684844725 in words is "six hundred eighty-four million, eight hundred forty-four thousand, seven hundred twenty-five".