13291969 has 4 divisors (see below), whose sum is σ = 13302100. Its totient is φ = 13281840.

The previous prime is 13291939. The next prime is 13292009. The reversal of 13291969 is 96919231.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 1299600 + 11992369 = 1140^2 + 3463^2 .

It is a cyclic number.

It is not a de Polignac number, because 13291969 - 2⁹ = 13291457 is a prime.

It is a super-2 number, since 2×13291969² = 353352879793922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13291919) 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 3 ways as a sum of consecutive naturals, for example, 2742 + ... + 5839.

It is an arithmetic number, because the mean of its divisors is an integer number (3325525).

Almost surely, 2^13291969 is an apocalyptic number.

It is an amenable number.

13291969 is a deficient number, since it is larger than the sum of its proper divisors (10131).

13291969 is an equidigital number, since it uses as much as digits as its factorization.

13291969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10130.

The product of its digits is 26244, while the sum is 40.

The square root of 13291969 is about 3645.8152723362. The cubic root of 13291969 is about 236.8807520829.

The spelling of 13291969 in words is "thirteen million, two hundred ninety-one thousand, nine hundred sixty-nine".