104813 has 4 divisors (see below), whose sum is σ = 105468. Its totient is φ = 104160.

The previous prime is 104803. The next prime is 104827. The reversal of 104813 is 318401.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 318401 = 31 ⋅10271.

It can be written as a sum of positive squares in 2 ways, for example, as 64009 + 40804 = 253^2 + 202^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-104813 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 104791 and 104800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (104803) 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, 95 + ... + 467.

It is an arithmetic number, because the mean of its divisors is an integer number (26367).

2¹⁰⁴⁸¹³ is an apocalyptic number.

It is an amenable number.

104813 is a deficient number, since it is larger than the sum of its proper divisors (655).

104813 is an equidigital number, since it uses as much as digits as its factorization.

104813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 654.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 104813 is about 323.7483590692. The cubic root of 104813 is about 47.1489165328.

The spelling of 104813 in words is "one hundred four thousand, eight hundred thirteen".