13539538 has 4 divisors (see below), whose sum is σ = 20309310. Its totient is φ = 6769768.

The previous prime is 13539511. The next prime is 13539557. The reversal of 13539538 is 83593531.

13539538 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 an emirpimes, since its reverse is a distinct semiprime: 83593531 = 7 ⋅11941933.

It can be written as a sum of positive squares in only one way, i.e., 10673289 + 2866249 = 3267^2 + 1693^2 .

It is a junction number, because it is equal to n+sod(n) for n = 13539497 and 13539506.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3384883 + ... + 3384886.

Almost surely, 2^13539538 is an apocalyptic number.

13539538 is a deficient number, since it is larger than the sum of its proper divisors (6769772).

13539538 is an equidigital number, since it uses as much as digits as its factorization.

13539538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6769771.

The product of its digits is 48600, while the sum is 37.

The square root of 13539538 is about 3679.6111207572. The cubic root of 13539538 is about 238.3423855376.

The spelling of 13539538 in words is "thirteen million, five hundred thirty-nine thousand, five hundred thirty-eight".