13673987 has 4 divisors (see below), whose sum is σ = 13697640. Its totient is φ = 13650336.

The previous prime is 13673981. The next prime is 13674019. The reversal of 13673987 is 78937631.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13673987 - 2⁶ = 13673923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13673981) 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, 10937 + ... + 12122.

It is an arithmetic number, because the mean of its divisors is an integer number (3424410).

Almost surely, 2^13673987 is an apocalyptic number.

13673987 is a deficient number, since it is larger than the sum of its proper divisors (23653).

13673987 is an equidigital number, since it uses as much as digits as its factorization.

13673987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23652.

The product of its digits is 190512, while the sum is 44.

The square root of 13673987 is about 3697.8354479344. The cubic root of 13673987 is about 239.1287099308.

The spelling of 13673987 in words is "thirteen million, six hundred seventy-three thousand, nine hundred eighty-seven".