684719044 has 6 divisors (see below), whose sum is σ = 1198258334. Its totient is φ = 342359520.

The previous prime is 684719011. The next prime is 684719069. The reversal of 684719044 is 440917486.

It can be written as a sum of positive squares in only one way, i.e., 496754944 + 187964100 = 22288^2 + 13710^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85589877 + ... + 85589884.

Almost surely, 2^684719044 is an apocalyptic number.

It is an amenable number.

684719044 is a deficient number, since it is larger than the sum of its proper divisors (513539290).

684719044 is a wasteful number, since it uses less digits than its factorization.

684719044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171179765 (or 171179763 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 43.

The square root of 684719044 is about 26167.1367176464. The cubic root of 684719044 is about 881.3954461476.

The spelling of 684719044 in words is "six hundred eighty-four million, seven hundred nineteen thousand, forty-four".