684719043 has 4 divisors (see below), whose sum is σ = 912958728. Its totient is φ = 456479360.

The previous prime is 684719011. The next prime is 684719069. The reversal of 684719043 is 340917486.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 684719043 - 2⁵ = 684719011 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 684718986 and 684719004.

It is not an unprimeable number, because it can be changed into a prime (684719843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114119838 + ... + 114119843.

It is an arithmetic number, because the mean of its divisors is an integer number (228239682).

Almost surely, 2^684719043 is an apocalyptic number.

684719043 is a deficient number, since it is larger than the sum of its proper divisors (228239685).

684719043 is a wasteful number, since it uses less digits than its factorization.

684719043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228239684.

The product of its (nonzero) digits is 145152, while the sum is 42.

The square root of 684719043 is about 26167.1366985385. The cubic root of 684719043 is about 881.3954457185.

The spelling of 684719043 in words is "six hundred eighty-four million, seven hundred nineteen thousand, forty-three".