13539938 has 4 divisors (see below), whose sum is σ = 20309910. Its totient is φ = 6769968.

The previous prime is 13539931. The next prime is 13539941. The reversal of 13539938 is 83993531.

13539938 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.

It can be written as a sum of positive squares in only one way, i.e., 8508889 + 5031049 = 2917^2 + 2243^2 .

It is a junction number, because it is equal to n+sod(n) for n = 13539895 and 13539904.

It is not an unprimeable number, because it can be changed into a prime (13539931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3384983 + ... + 3384986.

Almost surely, 2^13539938 is an apocalyptic number.

13539938 is a deficient number, since it is larger than the sum of its proper divisors (6769972).

13539938 is an equidigital number, since it uses as much as digits as its factorization.

13539938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6769971.

The product of its digits is 87480, while the sum is 41.

The square root of 13539938 is about 3679.6654739256. The cubic root of 13539938 is about 238.3447326392.

The spelling of 13539938 in words is "thirteen million, five hundred thirty-nine thousand, nine hundred thirty-eight".