813103523 has 6 divisors (see below), whose sum is σ = 863746956. Its totient is φ = 765273632.

The previous prime is 813103519. The next prime is 813103531. The reversal of 813103523 is 325301318.

It is not a de Polignac number, because 813103523 - 2² = 813103519 is a prime.

It is a super-2 number, since 2×813103523² = 1322274678230023058, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 813103492 and 813103501.

It is not an unprimeable number, because it can be changed into a prime (813103723) 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 5 ways as a sum of consecutive naturals, for example, 1406465 + ... + 1407042.

It is an arithmetic number, because the mean of its divisors is an integer number (143957826).

Almost surely, 2^813103523 is an apocalyptic number.

813103523 is a deficient number, since it is larger than the sum of its proper divisors (50643433).

813103523 is a wasteful number, since it uses less digits than its factorization.

813103523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2813541 (or 2813524 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 813103523 is about 28514.9701560426. The cubic root of 813103523 is about 933.3587736971.

The spelling of 813103523 in words is "eight hundred thirteen million, one hundred three thousand, five hundred twenty-three".