13287279 has 4 divisors (see below), whose sum is σ = 17716376. Its totient is φ = 8858184.

The previous prime is 13287277. The next prime is 13287293. The reversal of 13287279 is 97278231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97278231 = 3 ⋅32426077.

It is not a de Polignac number, because 13287279 - 2¹ = 13287277 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 (13287277) 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, 2214544 + ... + 2214549.

It is an arithmetic number, because the mean of its divisors is an integer number (4429094).

Almost surely, 2^13287279 is an apocalyptic number.

13287279 is a deficient number, since it is larger than the sum of its proper divisors (4429097).

13287279 is an equidigital number, since it uses as much as digits as its factorization.

13287279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4429096.

The product of its digits is 42336, while the sum is 39.

The square root of 13287279 is about 3645.1720124022. The cubic root of 13287279 is about 236.8528881043.

It can be divided in two parts, 13287 and 279, that multiplied together give a palindrome (3707073).

The spelling of 13287279 in words is "thirteen million, two hundred eighty-seven thousand, two hundred seventy-nine".