13929487 has 24 divisors (see below), whose sum is σ = 16865280. Its totient is φ = 11400480.

The previous prime is 13929481. The next prime is 13929493. The reversal of 13929487 is 78492931.

It is an interprime number because it is at equal distance from previous prime (13929481) and next prime (13929493).

It is not a de Polignac number, because 13929487 - 2¹¹ = 13927439 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13929481) 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 23 ways as a sum of consecutive naturals, for example, 109618 + ... + 109744.

It is an arithmetic number, because the mean of its divisors is an integer number (702720).

Almost surely, 2^13929487 is an apocalyptic number.

13929487 is a deficient number, since it is larger than the sum of its proper divisors (2935793).

13929487 is a wasteful number, since it uses less digits than its factorization.

13929487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223 (or 210 counting only the distinct ones).

The product of its digits is 108864, while the sum is 43.

The square root of 13929487 is about 3732.2227961364. Note that the first 3 decimals coincide. The cubic root of 13929487 is about 240.6089109836.

The spelling of 13929487 in words is "thirteen million, nine hundred twenty-nine thousand, four hundred eighty-seven".