13438679 has 2 divisors, whose sum is σ = 13438680. Its totient is φ = 13438678.

The previous prime is 13438673. The next prime is 13438697. The reversal of 13438679 is 97683431.

Together with next prime (13438697) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13438679 - 2¹² = 13434583 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13438673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6719339 + 6719340.

It is an arithmetic number, because the mean of its divisors is an integer number (6719340).

Almost surely, 2^13438679 is an apocalyptic number.

13438679 is a deficient number, since it is larger than the sum of its proper divisors (1).

13438679 is an equidigital number, since it uses as much as digits as its factorization.

13438679 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 41.

The square root of 13438679 is about 3665.8803853918. The cubic root of 13438679 is about 237.7490882512.

The spelling of 13438679 in words is "thirteen million, four hundred thirty-eight thousand, six hundred seventy-nine".