684974 has 8 divisors (see below), whose sum is σ = 1032480. Its totient is φ = 340816.

The previous prime is 684973. The next prime is 684977. The reversal of 684974 is 479486.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684973) 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, 239 + ... + 1194.

It is an arithmetic number, because the mean of its divisors is an integer number (129060).

2⁶⁸⁴⁹⁷⁴ is an apocalyptic number.

684974 is a deficient number, since it is larger than the sum of its proper divisors (347506).

684974 is a wasteful number, since it uses less digits than its factorization.

684974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1674.

The product of its digits is 48384, while the sum is 38.

The square root of 684974 is about 827.6315605389. The cubic root of 684974 is about 88.1504828808.

The spelling of 684974 in words is "six hundred eighty-four thousand, nine hundred seventy-four".