13329538 has 4 divisors (see below), whose sum is σ = 19994310. Its totient is φ = 6664768.

The previous prime is 13329521. The next prime is 13329557. The reversal of 13329538 is 83592331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83592331 = 137 ⋅610163.

It can be written as a sum of positive squares in only one way, i.e., 11471769 + 1857769 = 3387^2 + 1363^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3332383 + ... + 3332386.

Almost surely, 2^13329538 is an apocalyptic number.

13329538 is a deficient number, since it is larger than the sum of its proper divisors (6664772).

13329538 is an equidigital number, since it uses as much as digits as its factorization.

13329538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6664771.

The product of its digits is 19440, while the sum is 34.

The square root of 13329538 is about 3650.9639822929. The cubic root of 13329538 is about 237.1037188380.

The spelling of 13329538 in words is "thirteen million, three hundred twenty-nine thousand, five hundred thirty-eight".