12912613 has 4 divisors (see below), whose sum is σ = 14757280. Its totient is φ = 11067948.

The previous prime is 12912589. The next prime is 12912619. The reversal of 12912613 is 31621921.

12912613 is digitally balanced in base 2 and base 8, because in such bases it contains all the possibile digits an equal number of times.

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 12912613 - 2⁹ = 12912101 is a prime.

It is a Duffinian number.

12912613 is strictly pandigital in base 8.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12912619) 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, 922323 + ... + 922336.

It is an arithmetic number, because the mean of its divisors is an integer number (3689320).

Almost surely, 2^12912613 is an apocalyptic number.

It is an amenable number.

12912613 is a deficient number, since it is larger than the sum of its proper divisors (1844667).

12912613 is an equidigital number, since it uses as much as digits as its factorization.

12912613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1844666.

The product of its digits is 648, while the sum is 25.

The square root of 12912613 is about 3593.4124450166. The cubic root of 12912613 is about 234.6054220537.

It can be divided in two parts, 1291261 and 3, that multiplied together give a palindrome (3873783).

The spelling of 12912613 in words is "twelve million, nine hundred twelve thousand, six hundred thirteen".