673986 has 8 divisors (see below), whose sum is σ = 1347984. Its totient is φ = 224660.

The previous prime is 673979. The next prime is 673991. The reversal of 673986 is 689376.

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

673986 is an admirable number.

It is a plaindrome in base 14.

It is an unprimeable number.

673986 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56160 + ... + 56171.

It is an arithmetic number, because the mean of its divisors is an integer number (168498).

2⁶⁷³⁹⁸⁶ is an apocalyptic number.

673986 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

673986 is a wasteful number, since it uses less digits than its factorization.

673986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112336.

The product of its digits is 54432, while the sum is 39.

The square root of 673986 is about 820.9665035798. The cubic root of 673986 is about 87.6765848886.

The spelling of 673986 in words is "six hundred seventy-three thousand, nine hundred eighty-six".