13143329 has 16 divisors (see below), whose sum is σ = 14469840. Its totient is φ = 11888640.

The previous prime is 13143313. The next prime is 13143343. The reversal of 13143329 is 92334131.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 555025 + 12588304 = 745^2 + 3548^2 .

It is a cyclic number.

It is not a de Polignac number, because 13143329 - 2⁴ = 13143313 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13143298 and 13143307.

It is not an unprimeable number, because it can be changed into a prime (13143359) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75887 + ... + 76059.

It is an arithmetic number, because the mean of its divisors is an integer number (904365).

Almost surely, 2^13143329 is an apocalyptic number.

It is an amenable number.

13143329 is a deficient number, since it is larger than the sum of its proper divisors (1326511).

13143329 is a wasteful number, since it uses less digits than its factorization.

13143329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340.

The product of its digits is 1944, while the sum is 26.

The square root of 13143329 is about 3625.3729463326. The cubic root of 13143329 is about 235.9944518949.

The spelling of 13143329 in words is "thirteen million, one hundred forty-three thousand, three hundred twenty-nine".