13667639 has 2 divisors, whose sum is σ = 13667640. Its totient is φ = 13667638.

The previous prime is 13667629. The next prime is 13667651. The reversal of 13667639 is 93676631.

13667639 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13667639 - 2¹⁶ = 13602103 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13667596 and 13667605.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13667629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6833819 + 6833820.

It is an arithmetic number, because the mean of its divisors is an integer number (6833820).

Almost surely, 2^13667639 is an apocalyptic number.

13667639 is a deficient number, since it is larger than the sum of its proper divisors (1).

13667639 is an equidigital number, since it uses as much as digits as its factorization.

13667639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 122472, while the sum is 41.

The square root of 13667639 is about 3696.9770083137. The cubic root of 13667639 is about 239.0916999006.

The spelling of 13667639 in words is "thirteen million, six hundred sixty-seven thousand, six hundred thirty-nine".