104120813 has 4 divisors (see below), whose sum is σ = 104144700. Its totient is φ = 104096928.

The previous prime is 104120803. The next prime is 104120827. The reversal of 104120813 is 318021401.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 318021401 = 37 ⋅8595173.

It can be written as a sum of positive squares in 2 ways, for example, as 10843849 + 93276964 = 3293^2 + 9658^2 .

It is a cyclic number.

It is not a de Polignac number, because 104120813 - 2⁶ = 104120749 is a prime.

It is a super-2 number, since 2×104120813² = 21682287399561938, 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 (104120803) 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, 3338 + ... + 14811.

It is an arithmetic number, because the mean of its divisors is an integer number (26036175).

Almost surely, 2^104120813 is an apocalyptic number.

It is an amenable number.

104120813 is a deficient number, since it is larger than the sum of its proper divisors (23887).

104120813 is an equidigital number, since it uses as much as digits as its factorization.

104120813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23886.

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 104120813 is about 10203.9606526094. The cubic root of 104120813 is about 470.4489643839.

The spelling of 104120813 in words is "one hundred four million, one hundred twenty thousand, eight hundred thirteen".