684634 has 8 divisors (see below), whose sum is σ = 1034208. Its totient is φ = 339900.

The previous prime is 684617. The next prime is 684637. The reversal of 684634 is 436486.

684634 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 a junction number, because it is equal to n+sod(n) for n = 684596 and 684605.

It is not an unprimeable number, because it can be changed into a prime (684637) 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, 832 + ... + 1435.

It is an arithmetic number, because the mean of its divisors is an integer number (129276).

2⁶⁸⁴⁶³⁴ is an apocalyptic number.

684634 is a deficient number, since it is larger than the sum of its proper divisors (349574).

684634 is a wasteful number, since it uses less digits than its factorization.

684634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2420.

The product of its digits is 13824, while the sum is 31.

The square root of 684634 is about 827.4261296333. The cubic root of 684634 is about 88.1358954052.

The spelling of 684634 in words is "six hundred eighty-four thousand, six hundred thirty-four".