13929387 has 8 divisors (see below), whose sum is σ = 18623040. Its totient is φ = 9261000.

The previous prime is 13929371. The next prime is 13929431. The reversal of 13929387 is 78392931.

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

It is not a de Polignac number, because 13929387 - 2⁴ = 13929371 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13929317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4989 + ... + 7262.

It is an arithmetic number, because the mean of its divisors is an integer number (2327880).

Almost surely, 2^13929387 is an apocalyptic number.

13929387 is a deficient number, since it is larger than the sum of its proper divisors (4693653).

13929387 is a wasteful number, since it uses less digits than its factorization.

13929387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12633.

The product of its digits is 81648, while the sum is 42.

The square root of 13929387 is about 3732.2093992701. The cubic root of 13929387 is about 240.6083352039.

The spelling of 13929387 in words is "thirteen million, nine hundred twenty-nine thousand, three hundred eighty-seven".