684849725 has 72 divisors (see below), whose sum is σ = 1044933120. Its totient is φ = 443076480.

The previous prime is 684849701. The next prime is 684849731. The reversal of 684849725 is 527948486.

It is not a de Polignac number, because 684849725 - 2⁸ = 684849469 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 3070964 + ... + 3071186.

It is an arithmetic number, because the mean of its divisors is an integer number (14512960).

Almost surely, 2^684849725 is an apocalyptic number.

It is an amenable number.

684849725 is a deficient number, since it is larger than the sum of its proper divisors (360083395).

684849725 is a wasteful number, since it uses less digits than its factorization.

684849725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379 (or 367 counting only the distinct ones).

The product of its digits is 3870720, while the sum is 53.

The square root of 684849725 is about 26169.6336428312. The cubic root of 684849725 is about 881.4515150381.

The spelling of 684849725 in words is "six hundred eighty-four million, eight hundred forty-nine thousand, seven hundred twenty-five".