13224739 has 8 divisors (see below), whose sum is σ = 14664240. Its totient is φ = 11824800.

The previous prime is 13224737. The next prime is 13224749. The reversal of 13224739 is 93742231.

13224739 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 13224739 - 2¹ = 13224737 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13224739.

It is not an unprimeable number, because it can be changed into a prime (13224737) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9184 + ... + 10525.

It is an arithmetic number, because the mean of its divisors is an integer number (1833030).

Almost surely, 2^13224739 is an apocalyptic number.

13224739 is a deficient number, since it is larger than the sum of its proper divisors (1439501).

13224739 is a wasteful number, since it uses less digits than its factorization.

13224739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19781.

The product of its digits is 9072, while the sum is 31.

The square root of 13224739 is about 3636.5834240397. The cubic root of 13224739 is about 236.4807005245.

The spelling of 13224739 in words is "thirteen million, two hundred twenty-four thousand, seven hundred thirty-nine".