13638479 has 2 divisors, whose sum is σ = 13638480. Its totient is φ = 13638478.

The previous prime is 13638473. The next prime is 13638503. The reversal of 13638479 is 97483631.

13638479 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 13638479 - 2⁴ = 13638463 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13638473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6819239 + 6819240.

It is an arithmetic number, because the mean of its divisors is an integer number (6819240).

Almost surely, 2^13638479 is an apocalyptic number.

13638479 is a deficient number, since it is larger than the sum of its proper divisors (1).

13638479 is an equidigital number, since it uses as much as digits as its factorization.

13638479 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 13638479 is about 3693.0311398633. The cubic root of 13638479 is about 238.9215442489.

The spelling of 13638479 in words is "thirteen million, six hundred thirty-eight thousand, four hundred seventy-nine".