684482945 has 16 divisors (see below), whose sum is σ = 851934720. Its totient is φ = 527385600.

The previous prime is 684482941. The next prime is 684482957. The reversal of 684482945 is 549284486.

It is not a de Polignac number, because 684482945 - 2² = 684482941 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 684482893 and 684482902.

It is not an unprimeable number, because it can be changed into a prime (684482941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22241 + ... + 43169.

It is an arithmetic number, because the mean of its divisors is an integer number (53245920).

Almost surely, 2^684482945 is an apocalyptic number.

It is an amenable number.

684482945 is a deficient number, since it is larger than the sum of its proper divisors (167451775).

684482945 is a wasteful number, since it uses less digits than its factorization.

684482945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21176.

The product of its digits is 2211840, while the sum is 50.

The square root of 684482945 is about 26162.6249638678. The cubic root of 684482945 is about 881.2941294066.

The spelling of 684482945 in words is "six hundred eighty-four million, four hundred eighty-two thousand, nine hundred forty-five".