13691369 has 12 divisors (see below), whose sum is σ = 14368284. Its totient is φ = 13042944.

The previous prime is 13691351. The next prime is 13691387. The reversal of 13691369 is 96319631.

It is an interprime number because it is at equal distance from previous prime (13691351) and next prime (13691387).

It can be written as a sum of positive squares in 6 ways, for example, as 3534400 + 10156969 = 1880^2 + 3187^2 .

It is not a de Polignac number, because 13691369 - 2⁸ = 13691113 is a prime.

It is a super-2 number, since 2×13691369² = 374907170188322, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13691309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 99869 + ... + 100005.

It is an arithmetic number, because the mean of its divisors is an integer number (1197357).

Almost surely, 2^13691369 is an apocalyptic number.

It is an amenable number.

13691369 is a deficient number, since it is larger than the sum of its proper divisors (676915).

13691369 is an equidigital number, since it uses as much as digits as its factorization.

13691369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284 (or 247 counting only the distinct ones).

The product of its digits is 26244, while the sum is 38.

The square root of 13691369 is about 3700.1849953752. The cubic root of 13691369 is about 239.2299916626.

The spelling of 13691369 in words is "thirteen million, six hundred ninety-one thousand, three hundred sixty-nine".