13986667 has 4 divisors (see below), whose sum is σ = 13997920. Its totient is φ = 13975416.

The previous prime is 13986649. The next prime is 13986689. The reversal of 13986667 is 76668931.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 13986667 - 2²³ = 5598059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13986697) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3492 + ... + 6337.

It is an arithmetic number, because the mean of its divisors is an integer number (3499480).

Almost surely, 2^13986667 is an apocalyptic number.

13986667 is a deficient number, since it is larger than the sum of its proper divisors (11253).

13986667 is an equidigital number, since it uses as much as digits as its factorization.

13986667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11252.

The product of its digits is 326592, while the sum is 46.

The square root of 13986667 is about 3739.8752652996. The cubic root of 13986667 is about 240.9376915762.

The spelling of 13986667 in words is "thirteen million, nine hundred eighty-six thousand, six hundred sixty-seven".