684463972 has 6 divisors (see below), whose sum is σ = 1197811958. Its totient is φ = 342231984.

The previous prime is 684463937. The next prime is 684463991. The reversal of 684463972 is 279364486.

It can be written as a sum of positive squares in only one way, i.e., 487791396 + 196672576 = 22086^2 + 14024^2 .

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 as a sum of consecutive naturals, namely, 85557993 + ... + 85558000.

Almost surely, 2^684463972 is an apocalyptic number.

It is an amenable number.

684463972 is a deficient number, since it is larger than the sum of its proper divisors (513347986).

684463972 is a wasteful number, since it uses less digits than its factorization.

684463972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171115997 (or 171115995 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 49.

The square root of 684463972 is about 26162.2623639470. The cubic root of 684463972 is about 881.2859865458.

The spelling of 684463972 in words is "six hundred eighty-four million, four hundred sixty-three thousand, nine hundred seventy-two".