680998 has 8 divisors (see below), whose sum is σ = 1075320. Its totient is φ = 322560.

The previous prime is 680993. The next prime is 681001. The reversal of 680998 is 899086.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 680998.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680993) 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, 8923 + ... + 8998.

It is an arithmetic number, because the mean of its divisors is an integer number (134415).

2⁶⁸⁰⁹⁹⁸ is an apocalyptic number.

680998 is a deficient number, since it is larger than the sum of its proper divisors (394322).

680998 is a wasteful number, since it uses less digits than its factorization.

680998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17942.

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 680998 is about 825.2260296428. The cubic root of 680998 is about 87.9795923752.

The spelling of 680998 in words is "six hundred eighty thousand, nine hundred ninety-eight".