684674 has 4 divisors (see below), whose sum is σ = 1027014. Its totient is φ = 342336.

The previous prime is 684647. The next prime is 684683. The reversal of 684674 is 476486.

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

It can be written as a sum of positive squares in only one way, i.e., 664225 + 20449 = 815^2 + 143^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171167 + ... + 171170.

2⁶⁸⁴⁶⁷⁴ is an apocalyptic number.

684674 is a deficient number, since it is larger than the sum of its proper divisors (342340).

684674 is a wasteful number, since it uses less digits than its factorization.

684674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342339.

The product of its digits is 32256, while the sum is 35.

The square root of 684674 is about 827.4503006223. The cubic root of 684674 is about 88.1376118295.

The spelling of 684674 in words is "six hundred eighty-four thousand, six hundred seventy-four".