13943669 has 4 divisors (see below), whose sum is σ = 13953420. Its totient is φ = 13933920.

The previous prime is 13943659. The next prime is 13943729. The reversal of 13943669 is 96634931.

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 3020644 + 10923025 = 1738^2 + 3305^2 .

It is a cyclic number.

It is not a de Polignac number, because 13943669 - 2¹² = 13939573 is a prime.

It is a super-2 number, since 2×13943669² = 388851810363122, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13943639) 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, 2264 + ... + 5745.

It is an arithmetic number, because the mean of its divisors is an integer number (3488355).

Almost surely, 2^13943669 is an apocalyptic number.

It is an amenable number.

13943669 is a deficient number, since it is larger than the sum of its proper divisors (9751).

13943669 is an equidigital number, since it uses as much as digits as its factorization.

13943669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9750.

The product of its digits is 104976, while the sum is 41.

The square root of 13943669 is about 3734.1222529532. The cubic root of 13943669 is about 240.6905401724.

The spelling of 13943669 in words is "thirteen million, nine hundred forty-three thousand, six hundred sixty-nine".