13539869 has 8 divisors (see below), whose sum is σ = 15544128. Its totient is φ = 11553120.

The previous prime is 13539853. The next prime is 13539899. The reversal of 13539869 is 96893531.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13539869 - 2⁴ = 13539853 is a prime.

It is a super-2 number, since 2×13539869² = 366656105074322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13539899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2672 + ... + 5849.

It is an arithmetic number, because the mean of its divisors is an integer number (1943016).

Almost surely, 2^13539869 is an apocalyptic number.

It is an amenable number.

13539869 is a deficient number, since it is larger than the sum of its proper divisors (2004259).

13539869 is an equidigital number, since it uses as much as digits as its factorization.

13539869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8755.

The product of its digits is 174960, while the sum is 44.

The square root of 13539869 is about 3679.6560980613. The cubic root of 13539869 is about 238.3443277675.

It can be divided in two parts, 135 and 39869, that added together give a palindrome (40004).

The spelling of 13539869 in words is "thirteen million, five hundred thirty-nine thousand, eight hundred sixty-nine".