13431139 has 8 divisors (see below), whose sum is σ = 14335488. Its totient is φ = 12539520.

The previous prime is 13431137. The next prime is 13431161. The reversal of 13431139 is 93113431.

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 13431139 - 2¹ = 13431137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13431133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 952 + ... + 5269.

It is an arithmetic number, because the mean of its divisors is an integer number (1791936).

Almost surely, 2^13431139 is an apocalyptic number.

13431139 is a deficient number, since it is larger than the sum of its proper divisors (904349).

13431139 is a wasteful number, since it uses less digits than its factorization.

13431139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6365.

The product of its digits is 972, while the sum is 25.

The square root of 13431139 is about 3664.8518387515. The cubic root of 13431139 is about 237.7046155395.

The spelling of 13431139 in words is "thirteen million, four hundred thirty-one thousand, one hundred thirty-nine".