684107 has 4 divisors (see below), whose sum is σ = 685776. Its totient is φ = 682440.

The previous prime is 684091. The next prime is 684109. The reversal of 684107 is 701486.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 684107 - 2⁴ = 684091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (684109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 257 + ... + 1197.

It is an arithmetic number, because the mean of its divisors is an integer number (171444).

2⁶⁸⁴¹⁰⁷ is an apocalyptic number.

684107 is a deficient number, since it is larger than the sum of its proper divisors (1669).

684107 is an equidigital number, since it uses as much as digits as its factorization.

684107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1668.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 684107 is about 827.1076108947. The cubic root of 684107 is about 88.1132752706.

The spelling of 684107 in words is "six hundred eighty-four thousand, one hundred seven".