13205983 has 4 divisors (see below), whose sum is σ = 15092560. Its totient is φ = 11319408.

The previous prime is 13205981. The next prime is 13205987. The reversal of 13205983 is 38950231.

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: 38950231 = 3251 ⋅11981.

It is a cyclic number.

It is not a de Polignac number, because 13205983 - 2¹ = 13205981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13205981) 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 3 ways as a sum of consecutive naturals, for example, 943278 + ... + 943291.

It is an arithmetic number, because the mean of its divisors is an integer number (3773140).

Almost surely, 2^13205983 is an apocalyptic number.

13205983 is a deficient number, since it is larger than the sum of its proper divisors (1886577).

13205983 is an equidigital number, since it uses as much as digits as its factorization.

13205983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1886576.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 13205983 is about 3634.0037149128. The cubic root of 13205983 is about 236.3688512970.

The spelling of 13205983 in words is "thirteen million, two hundred five thousand, nine hundred eighty-three".