684002189 has 16 divisors (see below), whose sum is σ = 748853952. Its totient is φ = 620949888.

The previous prime is 684002183. The next prime is 684002201. The reversal of 684002189 is 981200486.

It is not a de Polignac number, because 684002189 - 2⁴ = 684002173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684002183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 419594 + ... + 421220.

It is an arithmetic number, because the mean of its divisors is an integer number (46803372).

Almost surely, 2^684002189 is an apocalyptic number.

It is an amenable number.

684002189 is a deficient number, since it is larger than the sum of its proper divisors (64851763).

684002189 is a wasteful number, since it uses less digits than its factorization.

684002189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2156.

The product of its (nonzero) digits is 27648, while the sum is 38.

The square root of 684002189 is about 26153.4355104640. The cubic root of 684002189 is about 881.0877514018.

The spelling of 684002189 in words is "six hundred eighty-four million, two thousand, one hundred eighty-nine".