13100813 has 4 divisors (see below), whose sum is σ = 14291808. Its totient is φ = 11909820.

The previous prime is 13100809. The next prime is 13100821. The reversal of 13100813 is 31800131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13100813 - 2² = 13100809 is a prime.

It is a Duffinian number.

13100813 is a modest number, since divided by 813 gives 131 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 13100791 and 13100800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13100513) 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, 595481 + ... + 595502.

It is an arithmetic number, because the mean of its divisors is an integer number (3572952).

Almost surely, 2^13100813 is an apocalyptic number.

It is an amenable number.

13100813 is a deficient number, since it is larger than the sum of its proper divisors (1190995).

13100813 is a wasteful number, since it uses less digits than its factorization.

13100813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1190994.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 13100813 is about 3619.5045241027. The cubic root of 13100813 is about 235.7397123124.

Adding to 13100813 its reverse (31800131), we get a palindrome (44900944).

The spelling of 13100813 in words is "thirteen million, one hundred thousand, eight hundred thirteen".