104240813 has 2 divisors, whose sum is σ = 104240814. Its totient is φ = 104240812.

The previous prime is 104240809. The next prime is 104240827. The reversal of 104240813 is 318042401.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71944324 + 32296489 = 8482^2 + 5683^2 .

It is an emirp because it is prime and its reverse (318042401) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 104240813 - 2² = 104240809 is a prime.

It is a super-2 number, since 2×104240813² = 21732294189801938, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (104240833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52120406 + 52120407.

It is an arithmetic number, because the mean of its divisors is an integer number (52120407).

Almost surely, 2^104240813 is an apocalyptic number.

It is an amenable number.

104240813 is a deficient number, since it is larger than the sum of its proper divisors (1).

104240813 is an equidigital number, since it uses as much as digits as its factorization.

104240813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 104240813 is about 10209.8390290935. The cubic root of 104240813 is about 470.6296269563.

The spelling of 104240813 in words is "one hundred four million, two hundred forty thousand, eight hundred thirteen".