681208303 has 4 divisors (see below), whose sum is σ = 681433480. Its totient is φ = 680983128.

The previous prime is 681208267. The next prime is 681208321. The reversal of 681208303 is 303802186.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 681208303 - 2¹⁷ = 681077231 is a prime.

It is a super-3 number, since 3×681208303³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681208103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 107988 + ... + 114121.

It is an arithmetic number, because the mean of its divisors is an integer number (170358370).

Almost surely, 2^681208303 is an apocalyptic number.

681208303 is a deficient number, since it is larger than the sum of its proper divisors (225177).

681208303 is a wasteful number, since it uses less digits than its factorization.

681208303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225176.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 681208303 is about 26099.9674904012. The cubic root of 681208303 is about 879.8864794163.

The spelling of 681208303 in words is "six hundred eighty-one million, two hundred eight thousand, three hundred three".