684707 has 4 divisors (see below), whose sum is σ = 697680. Its totient is φ = 671736.

The previous prime is 684683. The next prime is 684713. The reversal of 684707 is 707486.

684707 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 684707 - 2⁶ = 684643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (684727) 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, 6407 + ... + 6512.

It is an arithmetic number, because the mean of its divisors is an integer number (174420).

2⁶⁸⁴⁷⁰⁷ is an apocalyptic number.

684707 is a deficient number, since it is larger than the sum of its proper divisors (12973).

684707 is a wasteful number, since it uses less digits than its factorization.

684707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12972.

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 684707 is about 827.4702411567. The cubic root of 684707 is about 88.1390278291.

The spelling of 684707 in words is "six hundred eighty-four thousand, seven hundred seven".