13424729 has 4 divisors (see below), whose sum is σ = 13736976. Its totient is φ = 13112484.

The previous prime is 13424699. The next prime is 13424731. The reversal of 13424729 is 92742431.

13424729 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13424729 - 2⁸ = 13424473 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13424695 and 13424704.

It is not an unprimeable number, because it can be changed into a prime (13424429) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 156059 + ... + 156144.

It is an arithmetic number, because the mean of its divisors is an integer number (3434244).

Almost surely, 2^13424729 is an apocalyptic number.

It is an amenable number.

13424729 is a deficient number, since it is larger than the sum of its proper divisors (312247).

13424729 is an equidigital number, since it uses as much as digits as its factorization.

13424729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312246.

The product of its digits is 12096, while the sum is 32.

The square root of 13424729 is about 3663.9772106278. The cubic root of 13424729 is about 237.6667947450. Note that the first 3 decimals are identical.

The spelling of 13424729 in words is "thirteen million, four hundred twenty-four thousand, seven hundred twenty-nine".