684891946 has 8 divisors (see below), whose sum is σ = 1027784160. Its totient is φ = 342297228.

The previous prime is 684891919. The next prime is 684891989. The reversal of 684891946 is 649198486.

684891946 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×684891946³ (a number of 27 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68526 + ... + 77881.

It is an arithmetic number, because the mean of its divisors is an integer number (128473020).

Almost surely, 2^684891946 is an apocalyptic number.

684891946 is a deficient number, since it is larger than the sum of its proper divisors (342892214).

684891946 is a wasteful number, since it uses less digits than its factorization.

684891946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148748.

The product of its digits is 2985984, while the sum is 55.

The square root of 684891946 is about 26170.4403096318. The cubic root of 684891946 is about 881.4696285008.

The spelling of 684891946 in words is "six hundred eighty-four million, eight hundred ninety-one thousand, nine hundred forty-six".