684643355 has 8 divisors (see below), whose sum is σ = 896260464. Its totient is φ = 497922400.

The previous prime is 684643303. The next prime is 684643373. The reversal of 684643355 is 553346486.

It is a happy number.

684643355 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 not a de Polignac number, because 684643355 - 2¹² = 684639259 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6223976 + ... + 6224085.

It is an arithmetic number, because the mean of its divisors is an integer number (112032558).

Almost surely, 2^684643355 is an apocalyptic number.

684643355 is a deficient number, since it is larger than the sum of its proper divisors (211617109).

684643355 is a wasteful number, since it uses less digits than its factorization.

684643355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12448077.

The product of its digits is 1036800, while the sum is 44.

The square root of 684643355 is about 26165.6904170328. The cubic root of 684643355 is about 881.3629683993.

The spelling of 684643355 in words is "six hundred eighty-four million, six hundred forty-three thousand, three hundred fifty-five".