13992729 has 8 divisors (see below), whose sum is σ = 18963072. Its totient is φ = 9175440.

The previous prime is 13992637. The next prime is 13992731. The reversal of 13992729 is 92729931.

It is a happy number.

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

It is not a de Polignac number, because 13992729 - 2⁹ = 13992217 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13992829) 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 7 ways as a sum of consecutive naturals, for example, 38049 + ... + 38414.

It is an arithmetic number, because the mean of its divisors is an integer number (2370384).

Almost surely, 2^13992729 is an apocalyptic number.

It is an amenable number.

13992729 is a deficient number, since it is larger than the sum of its proper divisors (4970343).

13992729 is an equidigital number, since it uses as much as digits as its factorization.

13992729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76527.

The product of its digits is 61236, while the sum is 42.

The square root of 13992729 is about 3740.6856323407. The cubic root of 13992729 is about 240.9724950389.

The spelling of 13992729 in words is "thirteen million, nine hundred ninety-two thousand, seven hundred twenty-nine".