13729247 has 4 divisors (see below), whose sum is σ = 15690576. Its totient is φ = 11767920.

The previous prime is 13729223. The next prime is 13729291. The reversal of 13729247 is 74292731.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13729247 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 (13729207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 980654 + ... + 980667.

It is an arithmetic number, because the mean of its divisors is an integer number (3922644).

Almost surely, 2^13729247 is an apocalyptic number.

13729247 is a deficient number, since it is larger than the sum of its proper divisors (1961329).

13729247 is an equidigital number, since it uses as much as digits as its factorization.

13729247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1961328.

The product of its digits is 21168, while the sum is 35.

The square root of 13729247 is about 3705.2998529134. The cubic root of 13729247 is about 239.4504032713.

The spelling of 13729247 in words is "thirteen million, seven hundred twenty-nine thousand, two hundred forty-seven".