684572825 has 12 divisors (see below), whose sum is σ = 849281580. Its totient is φ = 547392960.

The previous prime is 684572767. The next prime is 684572843. The reversal of 684572825 is 528275486.

It can be written as a sum of positive squares in 6 ways, for example, as 9560464 + 675012361 = 3092^2 + 25981^2 .

It is not a de Polignac number, because 684572825 - 2¹⁴ = 684556441 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 684572825.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 58571 + ... + 69279.

It is an arithmetic number, because the mean of its divisors is an integer number (70773465).

Almost surely, 2^684572825 is an apocalyptic number.

It is an amenable number.

684572825 is a deficient number, since it is larger than the sum of its proper divisors (164708755).

684572825 is a wasteful number, since it uses less digits than its factorization.

684572825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13276 (or 13271 counting only the distinct ones).

The product of its digits is 1075200, while the sum is 47.

The square root of 684572825 is about 26164.3426250307. The cubic root of 684572825 is about 881.3327021960.

The spelling of 684572825 in words is "six hundred eighty-four million, five hundred seventy-two thousand, eight hundred twenty-five".