13256779 has 4 divisors (see below), whose sum is σ = 13291776. Its totient is φ = 13221784.

The previous prime is 13256777. The next prime is 13256797. The reversal of 13256779 is 97765231.

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 13256779 - 2¹ = 13256777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13256777) 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, 16924 + ... + 17689.

It is an arithmetic number, because the mean of its divisors is an integer number (3322944).

Almost surely, 2^13256779 is an apocalyptic number.

13256779 is a deficient number, since it is larger than the sum of its proper divisors (34997).

13256779 is an equidigital number, since it uses as much as digits as its factorization.

13256779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34996.

The product of its digits is 79380, while the sum is 40.

The square root of 13256779 is about 3640.9859928322. The cubic root of 13256779 is about 236.6715229668.

The spelling of 13256779 in words is "thirteen million, two hundred fifty-six thousand, seven hundred seventy-nine".