684919852 has 12 divisors (see below), whose sum is σ = 1250723376. Its totient is φ = 327570320.

The previous prime is 684919819. The next prime is 684919853. The reversal of 684919852 is 258919486.

It is a self number, because there is not a number n which added to its sum of digits gives 684919852.

It is not an unprimeable number, because it can be changed into a prime (684919853) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3722299 + ... + 3722482.

It is an arithmetic number, because the mean of its divisors is an integer number (104226948).

Almost surely, 2^684919852 is an apocalyptic number.

It is an amenable number.

684919852 is a deficient number, since it is larger than the sum of its proper divisors (565803524).

684919852 is a wasteful number, since it uses less digits than its factorization.

684919852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7444808 (or 7444806 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 52.

The square root of 684919852 is about 26170.9734629799. The cubic root of 684919852 is about 881.4816001981.

The spelling of 684919852 in words is "six hundred eighty-four million, nine hundred nineteen thousand, eight hundred fifty-two".