13929427 has 4 divisors (see below), whose sum is σ = 14305936. Its totient is φ = 13552920.

The previous prime is 13929371. The next prime is 13929431. The reversal of 13929427 is 72492931.

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 13929427 - 2¹¹ = 13927379 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37), and also a Moran number because the ratio is a prime number: 376471 = 13929427 / (1 + 3 + 9 + 2 + 9 + 4 + 2 + 7).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13929457) 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 3 ways as a sum of consecutive naturals, for example, 188199 + ... + 188272.

It is an arithmetic number, because the mean of its divisors is an integer number (3576484).

Almost surely, 2^13929427 is an apocalyptic number.

13929427 is a deficient number, since it is larger than the sum of its proper divisors (376509).

13929427 is an equidigital number, since it uses as much as digits as its factorization.

13929427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376508.

The product of its digits is 27216, while the sum is 37.

The square root of 13929427 is about 3732.2147580224. The cubic root of 13929427 is about 240.6085655161.

The spelling of 13929427 in words is "thirteen million, nine hundred twenty-nine thousand, four hundred twenty-seven".