12513779 has 4 divisors (see below), whose sum is σ = 12635376. Its totient is φ = 12392184.

The previous prime is 12513769. The next prime is 12513793. The reversal of 12513779 is 97731521.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97731521 = 17 ⋅5748913.

It is a cyclic number.

It is not a de Polignac number, because 12513779 - 2⁴ = 12513763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12513749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60644 + ... + 60849.

It is an arithmetic number, because the mean of its divisors is an integer number (3158844).

Almost surely, 2^12513779 is an apocalyptic number.

12513779 is a deficient number, since it is larger than the sum of its proper divisors (121597).

12513779 is a wasteful number, since it uses less digits than its factorization.

12513779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121596.

The product of its digits is 13230, while the sum is 35.

The square root of 12513779 is about 3537.4820140886. The cubic root of 12513779 is about 232.1646856363.

The spelling of 12513779 in words is "twelve million, five hundred thirteen thousand, seven hundred seventy-nine".