681430403 has 8 divisors (see below), whose sum is σ = 686965440. Its totient is φ = 675904680.

The previous prime is 681430391. The next prime is 681430411. The reversal of 681430403 is 304034186.

681430403 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 681430403 - 2¹⁰ = 681429379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (681430423) 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, 250376 + ... + 253082.

It is an arithmetic number, because the mean of its divisors is an integer number (85870680).

Almost surely, 2^681430403 is an apocalyptic number.

681430403 is a deficient number, since it is larger than the sum of its proper divisors (5535037).

681430403 is a wasteful number, since it uses less digits than its factorization.

681430403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4657.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 681430403 is about 26104.2219382229. The cubic root of 681430403 is about 879.9820945909.

Adding to 681430403 its reverse (304034186), we get a palindrome (985464589).

The spelling of 681430403 in words is "six hundred eighty-one million, four hundred thirty thousand, four hundred three".