13491329 has 4 divisors (see below), whose sum is σ = 13498884. Its totient is φ = 13483776.

The previous prime is 13491323. The next prime is 13491341. The reversal of 13491329 is 92319431.

13491329 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 92319431 = 2819 ⋅32749.

It can be written as a sum of positive squares in 2 ways, for example, as 1575025 + 11916304 = 1255^2 + 3452^2 .

It is a cyclic number.

It is not a de Polignac number, because 13491329 - 2⁸ = 13491073 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13491295 and 13491304.

It is not an unprimeable number, because it can be changed into a prime (13491323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 569 + ... + 5225.

It is an arithmetic number, because the mean of its divisors is an integer number (3374721).

Almost surely, 2^13491329 is an apocalyptic number.

It is an amenable number.

13491329 is a deficient number, since it is larger than the sum of its proper divisors (7555).

13491329 is an equidigital number, since it uses as much as digits as its factorization.

13491329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7554.

The product of its digits is 5832, while the sum is 32.

The square root of 13491329 is about 3673.0544509985. The cubic root of 13491329 is about 238.0591677860.

The spelling of 13491329 in words is "thirteen million, four hundred ninety-one thousand, three hundred twenty-nine".