12799813 has 8 divisors (see below), whose sum is σ = 14011256. Its totient is φ = 11620800.

The previous prime is 12799811. The next prime is 12799819. The reversal of 12799813 is 31899721.

12799813 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 289444 + 12510369 = 538^2 + 3537^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12799813 - 2¹ = 12799811 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12799811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7278 + ... + 8863.

It is an arithmetic number, because the mean of its divisors is an integer number (1751407).

Almost surely, 2^12799813 is an apocalyptic number.

12799813 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

12799813 is a deficient number, since it is larger than the sum of its proper divisors (1211443).

12799813 is a wasteful number, since it uses less digits than its factorization.

12799813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16215.

The product of its digits is 27216, while the sum is 40.

The square root of 12799813 is about 3577.6826298597. The cubic root of 12799813 is about 233.9202799029.

The spelling of 12799813 in words is "twelve million, seven hundred ninety-nine thousand, eight hundred thirteen".