684904233 has 16 divisors (see below), whose sum is σ = 984233600. Its totient is φ = 421144704.

The previous prime is 684904219. The next prime is 684904243. The reversal of 684904233 is 332409486.

684904233 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 684904233 - 2⁹ = 684903721 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 684904191 and 684904200.

It is not an unprimeable number, because it can be changed into a prime (684904243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48285 + ... + 60837.

It is an arithmetic number, because the mean of its divisors is an integer number (61514600).

Almost surely, 2^684904233 is an apocalyptic number.

It is an amenable number.

684904233 is a deficient number, since it is larger than the sum of its proper divisors (299329367).

684904233 is a wasteful number, since it uses less digits than its factorization.

684904233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13968.

The product of its (nonzero) digits is 124416, while the sum is 39.

The square root of 684904233 is about 26170.6750581639. The cubic root of 684904233 is about 881.4748996741.

The spelling of 684904233 in words is "six hundred eighty-four million, nine hundred four thousand, two hundred thirty-three".