684134187 has 8 divisors (see below), whose sum is σ = 995104320. Its totient is φ = 414626760.

The previous prime is 684134183. The next prime is 684134237. The reversal of 684134187 is 781431486.

684134187 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 684134187 - 2² = 684134183 is a prime.

It is not an unprimeable number, because it can be changed into a prime (684134183) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10365637 + ... + 10365702.

It is an arithmetic number, because the mean of its divisors is an integer number (124388040).

Almost surely, 2^684134187 is an apocalyptic number.

684134187 is a deficient number, since it is larger than the sum of its proper divisors (310970133).

684134187 is a wasteful number, since it uses less digits than its factorization.

684134187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20731353.

The product of its digits is 129024, while the sum is 42.

The square root of 684134187 is about 26155.9589195273. The cubic root of 684134187 is about 881.1444248757.

The spelling of 684134187 in words is "six hundred eighty-four million, one hundred thirty-four thousand, one hundred eighty-seven".