13638429 has 16 divisors (see below), whose sum is σ = 23091840. Its totient is φ = 7793280.

The previous prime is 13638421. The next prime is 13638451. The reversal of 13638429 is 92483631.

13638429 is a `hidden beast` number, since 13 + 638 + 4 + 2 + 9 = 666.

It is not a de Polignac number, because 13638429 - 2³ = 13638421 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13638393 and 13638402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13638421) 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 in 15 ways as a sum of consecutive naturals, for example, 35892 + ... + 36269.

It is an arithmetic number, because the mean of its divisors is an integer number (1443240).

Almost surely, 2^13638429 is an apocalyptic number.

It is an amenable number.

13638429 is a deficient number, since it is larger than the sum of its proper divisors (9453411).

13638429 is an equidigital number, since it uses as much as digits as its factorization.

13638429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72177 (or 72171 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 13638429 is about 3693.0243703501. The cubic root of 13638429 is about 238.9212522786.

The spelling of 13638429 in words is "thirteen million, six hundred thirty-eight thousand, four hundred twenty-nine".