13638667 has 8 divisors (see below), whose sum is σ = 16090112. Its totient is φ = 11313000.

The previous prime is 13638661. The next prime is 13638679. The reversal of 13638667 is 76683631.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13638667 - 2³ = 13638659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13638661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31209 + ... + 31642.

It is an arithmetic number, because the mean of its divisors is an integer number (2011264).

Almost surely, 2^13638667 is an apocalyptic number.

13638667 is a deficient number, since it is larger than the sum of its proper divisors (2451445).

13638667 is an equidigital number, since it uses as much as digits as its factorization.

13638667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62889.

The product of its digits is 108864, while the sum is 40.

The square root of 13638667 is about 3693.0565931217. The cubic root of 13638667 is about 238.9226420508.

The spelling of 13638667 in words is "thirteen million, six hundred thirty-eight thousand, six hundred sixty-seven".