13983639 has 16 divisors (see below), whose sum is σ = 20782080. Its totient is φ = 8311680.

The previous prime is 13983587. The next prime is 13983647. The reversal of 13983639 is 93638931.

It is not a de Polignac number, because 13983639 - 2¹⁹ = 13459351 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13983639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13983689) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6247 + ... + 8184.

It is an arithmetic number, because the mean of its divisors is an integer number (1298880).

Almost surely, 2^13983639 is an apocalyptic number.

13983639 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

13983639 is a deficient number, since it is larger than the sum of its proper divisors (6798441).

13983639 is a wasteful number, since it uses less digits than its factorization.

13983639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14470.

The product of its digits is 104976, while the sum is 42.

The square root of 13983639 is about 3739.4704170511. The cubic root of 13983639 is about 240.9203033024.

The spelling of 13983639 in words is "thirteen million, nine hundred eighty-three thousand, six hundred thirty-nine".