13143309 has 8 divisors (see below), whose sum is σ = 17746560. Its totient is φ = 8651136.

The previous prime is 13143301. The next prime is 13143313. The reversal of 13143309 is 90334131.

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

It is not a de Polignac number, because 13143309 - 2³ = 13143301 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13143301) 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, 27492 + ... + 27965.

It is an arithmetic number, because the mean of its divisors is an integer number (2218320).

Almost surely, 2^13143309 is an apocalyptic number.

It is an amenable number.

13143309 is a deficient number, since it is larger than the sum of its proper divisors (4603251).

13143309 is an equidigital number, since it uses as much as digits as its factorization.

13143309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55539.

The product of its (nonzero) digits is 972, while the sum is 24.

The square root of 13143309 is about 3625.3701879946. The cubic root of 13143309 is about 235.9943321918.

The spelling of 13143309 in words is "thirteen million, one hundred forty-three thousand, three hundred nine".