13439905 has 16 divisors (see below), whose sum is σ = 16977600. Its totient is φ = 10198720.

The previous prime is 13439893. The next prime is 13439929. The reversal of 13439905 is 50993431.

It is a de Polignac number, because none of the positive numbers 2^k-13439905 is a prime.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 7770 + ... + 9340.

It is an arithmetic number, because the mean of its divisors is an integer number (1061100).

Almost surely, 2^13439905 is an apocalyptic number.

It is an amenable number.

13439905 is a deficient number, since it is larger than the sum of its proper divisors (3537695).

13439905 is a wasteful number, since it uses less digits than its factorization.

13439905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1664.

The product of its (nonzero) digits is 14580, while the sum is 34.

The square root of 13439905 is about 3666.0475992545. The cubic root of 13439905 is about 237.7563179181.

The spelling of 13439905 in words is "thirteen million, four hundred thirty-nine thousand, nine hundred five".