13144729 has 8 divisors (see below), whose sum is σ = 14184072. Its totient is φ = 12109440.

The previous prime is 13144721. The next prime is 13144741. The reversal of 13144729 is 92744131.

It can be written as a sum of positive squares in 4 ways, for example, as 719104 + 12425625 = 848^2 + 3525^2 .

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 13144729 - 2³ = 13144721 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 13144729.

It is not an unprimeable number, because it can be changed into a prime (13144721) 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, 11859 + ... + 12919.

It is an arithmetic number, because the mean of its divisors is an integer number (1773009).

Almost surely, 2^13144729 is an apocalyptic number.

It is an amenable number.

13144729 is a deficient number, since it is larger than the sum of its proper divisors (1039343).

13144729 is a wasteful number, since it uses less digits than its factorization.

13144729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2027.

The product of its digits is 6048, while the sum is 31.

The square root of 13144729 is about 3625.5660247746. The cubic root of 13144729 is about 236.0028308097.

The spelling of 13144729 in words is "thirteen million, one hundred forty-four thousand, seven hundred twenty-nine".