12913655 has 4 divisors (see below), whose sum is σ = 15496392. Its totient is φ = 10330920.

The previous prime is 12913651. The next prime is 12913661. The reversal of 12913655 is 55631921.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 12913655 - 2² = 12913651 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 (12913651) 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, 1291361 + ... + 1291370.

It is an arithmetic number, because the mean of its divisors is an integer number (3874098).

Almost surely, 2^12913655 is an apocalyptic number.

12913655 is a deficient number, since it is larger than the sum of its proper divisors (2582737).

12913655 is an equidigital number, since it uses as much as digits as its factorization.

12913655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2582736.

The product of its digits is 8100, while the sum is 32.

The square root of 12913655 is about 3593.5574296232. The cubic root of 12913655 is about 234.6117324799.

The spelling of 12913655 in words is "twelve million, nine hundred thirteen thousand, six hundred fifty-five".