673998 has 16 divisors (see below), whose sum is σ = 1451856. Its totient is φ = 207360.

The previous prime is 673991. The next prime is 674017. The reversal of 673998 is 899376.

It is a happy number.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (673991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4243 + ... + 4398.

It is an arithmetic number, because the mean of its divisors is an integer number (90741).

2⁶⁷³⁹⁹⁸ is an apocalyptic number.

673998 is an abundant number, since it is smaller than the sum of its proper divisors (777858).

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

673998 is a wasteful number, since it uses less digits than its factorization.

673998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8659.

The product of its digits is 81648, while the sum is 42.

The square root of 673998 is about 820.9738120062. The cubic root of 673998 is about 87.6771052321.

The spelling of 673998 in words is "six hundred seventy-three thousand, nine hundred ninety-eight".