813103603 has 16 divisors (see below), whose sum is σ = 892251360. Its totient is φ = 736379136.

The previous prime is 813103597. The next prime is 813103637. The reversal of 813103603 is 306301318.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 813103603 - 2⁹ = 813103091 is a prime.

It is a super-2 number, since 2×813103603² = 1322274938423163218, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (813103673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 656701 + ... + 657937.

It is an arithmetic number, because the mean of its divisors is an integer number (55765710).

Almost surely, 2^813103603 is an apocalyptic number.

813103603 is a deficient number, since it is larger than the sum of its proper divisors (79147757).

813103603 is a wasteful number, since it uses less digits than its factorization.

813103603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2166.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 813103603 is about 28514.9715588145. The cubic root of 813103603 is about 933.3588043077.

The spelling of 813103603 in words is "eight hundred thirteen million, one hundred three thousand, six hundred three".