13279665 has 16 divisors (see below), whose sum is σ = 24283008. Its totient is φ = 6070656.

The previous prime is 13279631. The next prime is 13279667. The reversal of 13279665 is 56697231.

It is not a de Polignac number, because 13279665 - 2⁹ = 13279153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13279667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63132 + ... + 63341.

It is an arithmetic number, because the mean of its divisors is an integer number (1517688).

Almost surely, 2^13279665 is an apocalyptic number.

13279665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13279665 is a deficient number, since it is larger than the sum of its proper divisors (11003343).

13279665 is a wasteful number, since it uses less digits than its factorization.

13279665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126488.

The product of its digits is 68040, while the sum is 39.

The square root of 13279665 is about 3644.1274675840. The cubic root of 13279665 is about 236.8076382462.

It can be divided in two parts, 132 and 79665, that added together give a palindrome (79797).

The spelling of 13279665 in words is "thirteen million, two hundred seventy-nine thousand, six hundred sixty-five".