12613279 has 4 divisors (see below), whose sum is σ = 14415184. Its totient is φ = 10811376.

The previous prime is 12613243. The next prime is 12613291. The reversal of 12613279 is 97231621.

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

It is a cyclic number.

It is not a de Polignac number, because 12613279 - 2¹⁹ = 12088991 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12613279.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12613229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 900942 + ... + 900955.

It is an arithmetic number, because the mean of its divisors is an integer number (3603796).

Almost surely, 2^12613279 is an apocalyptic number.

12613279 is a deficient number, since it is larger than the sum of its proper divisors (1801905).

12613279 is an equidigital number, since it uses as much as digits as its factorization.

12613279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1801904.

The product of its digits is 4536, while the sum is 31.

The square root of 12613279 is about 3551.5178445279. The cubic root of 12613279 is about 232.7783939258.

The spelling of 12613279 in words is "twelve million, six hundred thirteen thousand, two hundred seventy-nine".