13669939 has 2 divisors, whose sum is σ = 13669940. Its totient is φ = 13669938.

The previous prime is 13669937. The next prime is 13669961. The reversal of 13669939 is 93996631.

It is a weak prime.

It is an emirp because it is prime and its reverse (93996631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13669939 - 2¹ = 13669937 is a prime.

Together with 13669937, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (13669937) 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 as a sum of consecutive naturals, namely, 6834969 + 6834970.

It is an arithmetic number, because the mean of its divisors is an integer number (6834970).

Almost surely, 2^13669939 is an apocalyptic number.

13669939 is a deficient number, since it is larger than the sum of its proper divisors (1).

13669939 is an equidigital number, since it uses as much as digits as its factorization.

13669939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 236196, while the sum is 46.

The square root of 13669939 is about 3697.2880601868. The cubic root of 13669939 is about 239.1051106554.

The spelling of 13669939 in words is "thirteen million, six hundred sixty-nine thousand, nine hundred thirty-nine".