13690669 has 4 divisors (see below), whose sum is σ = 13698396. Its totient is φ = 13682944.

The previous prime is 13690667. The next prime is 13690687. The reversal of 13690669 is 96609631.

It is a happy number.

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 11088900 + 2601769 = 3330^2 + 1613^2 .

It is a cyclic number.

It is not a de Polignac number, because 13690669 - 2¹ = 13690667 is a prime.

It is a super-2 number, since 2×13690669² = 374868835335122, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13690667) 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 3 ways as a sum of consecutive naturals, for example, 267 + ... + 5239.

It is an arithmetic number, because the mean of its divisors is an integer number (3424599).

Almost surely, 2^13690669 is an apocalyptic number.

It is an amenable number.

13690669 is a deficient number, since it is larger than the sum of its proper divisors (7727).

13690669 is an equidigital number, since it uses as much as digits as its factorization.

13690669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7726.

The product of its (nonzero) digits is 52488, while the sum is 40.

The square root of 13690669 is about 3700.0904043010. The cubic root of 13690669 is about 239.2259145479.

The spelling of 13690669 in words is "thirteen million, six hundred ninety thousand, six hundred sixty-nine".