12513813 has 8 divisors (see below), whose sum is σ = 17968608. Its totient is φ = 7700784.

The previous prime is 12513793. The next prime is 12513847. The reversal of 12513813 is 31831521.

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

It is not a de Polignac number, because 12513813 - 2⁶ = 12513749 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12513713) 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, 160395 + ... + 160472.

It is an arithmetic number, because the mean of its divisors is an integer number (2246076).

Almost surely, 2^12513813 is an apocalyptic number.

12513813 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

12513813 is a deficient number, since it is larger than the sum of its proper divisors (5454795).

12513813 is a wasteful number, since it uses less digits than its factorization.

12513813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320883.

The product of its digits is 720, while the sum is 24.

The square root of 12513813 is about 3537.4868197634. The cubic root of 12513813 is about 232.1648959003.

The spelling of 12513813 in words is "twelve million, five hundred thirteen thousand, eight hundred thirteen".