13643839 has 6 divisors (see below), whose sum is σ = 14997080. Its totient is φ = 12403380.

The previous prime is 13643837. The next prime is 13643863. The reversal of 13643839 is 93834631.

It is not a de Polignac number, because 13643839 - 2¹ = 13643837 is a prime.

It is a Duffinian number.

It is a zygodrome in base 11.

It is a junction number, because it is equal to n+sod(n) for n = 13643798 and 13643807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13643837) 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 in 5 ways as a sum of consecutive naturals, for example, 56259 + ... + 56500.

Almost surely, 2^13643839 is an apocalyptic number.

13643839 is a deficient number, since it is larger than the sum of its proper divisors (1353241).

13643839 is a wasteful number, since it uses less digits than its factorization.

13643839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112781 (or 112770 counting only the distinct ones).

The product of its digits is 46656, while the sum is 37.

The square root of 13643839 is about 3693.7567597231. The cubic root of 13643839 is about 238.9528393259.

The spelling of 13643839 in words is "thirteen million, six hundred forty-three thousand, eight hundred thirty-nine".