13491439 has 12 divisors (see below), whose sum is σ = 14777616. Its totient is φ = 12310272.

The previous prime is 13491437. The next prime is 13491449. The reversal of 13491439 is 93419431.

It is not a de Polignac number, because 13491439 - 2¹ = 13491437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13491433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15982 + ... + 16804.

It is an arithmetic number, because the mean of its divisors is an integer number (1231468).

Almost surely, 2^13491439 is an apocalyptic number.

13491439 is a deficient number, since it is larger than the sum of its proper divisors (1286177).

13491439 is an equidigital number, since it uses as much as digits as its factorization.

13491439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 946 (or 933 counting only the distinct ones).

The product of its digits is 11664, while the sum is 34.

The square root of 13491439 is about 3673.0694248816. The cubic root of 13491439 is about 238.0598147802.

The spelling of 13491439 in words is "thirteen million, four hundred ninety-one thousand, four hundred thirty-nine".