13469987 has 4 divisors (see below), whose sum is σ = 13632360. Its totient is φ = 13307616.

The previous prime is 13469983. The next prime is 13469999. The reversal of 13469987 is 78996431.

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 13469987 - 2² = 13469983 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13469983) 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 3 ways as a sum of consecutive naturals, for example, 81062 + ... + 81227.

It is an arithmetic number, because the mean of its divisors is an integer number (3408090).

Almost surely, 2^13469987 is an apocalyptic number.

13469987 is a deficient number, since it is larger than the sum of its proper divisors (162373).

13469987 is an equidigital number, since it uses as much as digits as its factorization.

13469987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162372.

The product of its digits is 326592, while the sum is 47.

The square root of 13469987 is about 3670.1480896552. The cubic root of 13469987 is about 237.9335725449.

The spelling of 13469987 in words is "thirteen million, four hundred sixty-nine thousand, nine hundred eighty-seven".