13689542 has 4 divisors (see below), whose sum is σ = 20534316. Its totient is φ = 6844770.

The previous prime is 13689541. The next prime is 13689547. The reversal of 13689542 is 24598631.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24598631 = 113 ⋅217687.

It is a junction number, because it is equal to n+sod(n) for n = 13689496 and 13689505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13689541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3422384 + ... + 3422387.

It is an arithmetic number, because the mean of its divisors is an integer number (5133579).

Almost surely, 2^13689542 is an apocalyptic number.

13689542 is a deficient number, since it is larger than the sum of its proper divisors (6844774).

13689542 is an equidigital number, since it uses as much as digits as its factorization.

13689542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6844773.

The product of its digits is 51840, while the sum is 38.

The square root of 13689542 is about 3699.9381075904. The cubic root of 13689542 is about 239.2193501011.

The spelling of 13689542 in words is "thirteen million, six hundred eighty-nine thousand, five hundred forty-two".