680903 has 4 divisors (see below), whose sum is σ = 716760. Its totient is φ = 645048.

The previous prime is 680881. The next prime is 680917. The reversal of 680903 is 309086.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 309086 = 2 ⋅154543.

It is a cyclic number.

It is not a de Polignac number, because 680903 - 2¹⁰ = 679879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 680903.

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 (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17900 + ... + 17937.

It is an arithmetic number, because the mean of its divisors is an integer number (179190).

2⁶⁸⁰⁹⁰³ is an apocalyptic number.

680903 is a deficient number, since it is larger than the sum of its proper divisors (35857).

680903 is a wasteful number, since it uses less digits than its factorization.

680903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35856.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 680903 is about 825.1684676477. The cubic root of 680903 is about 87.9755011003.

Adding to 680903 its reverse (309086), we get a palindrome (989989).

The spelling of 680903 in words is "six hundred eighty thousand, nine hundred three".