680994 has 16 divisors (see below), whose sum is σ = 1513440. Its totient is φ = 226980.

The previous prime is 680993. The next prime is 681001. The reversal of 680994 is 499086.

It is an Ulam number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (680993) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 6252 + ... + 6359.

It is an arithmetic number, because the mean of its divisors is an integer number (94590).

2⁶⁸⁰⁹⁹⁴ is an apocalyptic number.

680994 is an abundant number, since it is smaller than the sum of its proper divisors (832446).

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

680994 is a wasteful number, since it uses less digits than its factorization.

680994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12622 (or 12616 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 680994 is about 825.2236060608. The cubic root of 680994 is about 87.9794201186.

It can be divided in two parts, 6809 and 94, that multiplied together give a palindrome (640046).

The spelling of 680994 in words is "six hundred eighty thousand, nine hundred ninety-four".