813103 has 4 divisors (see below), whose sum is σ = 818440. Its totient is φ = 807768.

The previous prime is 813097. The next prime is 813107. The reversal of 813103 is 301318.

813103 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 301318 = 2 ⋅150659.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-813103 is a prime.

It is a super-2 number, since 2×813103² = 1322272977218, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (813107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2433 + ... + 2746.

It is an arithmetic number, because the mean of its divisors is an integer number (204610).

2⁸¹³¹⁰³ is an apocalyptic number.

813103 is a deficient number, since it is larger than the sum of its proper divisors (5337).

813103 is a wasteful number, since it uses less digits than its factorization.

813103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5336.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 813103 is about 901.7222410477. The cubic root of 813103 is about 93.3358573580.

The spelling of 813103 in words is "eight hundred thirteen thousand, one hundred three".