13399905 has 16 divisors (see below), whose sum is σ = 22132224. Its totient is φ = 6915840.

The previous prime is 13399889. The next prime is 13399949. The reversal of 13399905 is 50999331.

It is not a de Polignac number, because 13399905 - 2⁴ = 13399889 is a prime.

It is a Curzon number.

It is a nialpdrome in base 16.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 13944 + ... + 14873.

It is an arithmetic number, because the mean of its divisors is an integer number (1383264).

Almost surely, 2^13399905 is an apocalyptic number.

13399905 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13399905 is a deficient number, since it is larger than the sum of its proper divisors (8732319).

13399905 is a wasteful number, since it uses less digits than its factorization.

13399905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28856.

The product of its (nonzero) digits is 32805, while the sum is 39.

The square root of 13399905 is about 3660.5880675105. The cubic root of 13399905 is about 237.5202124995.

The spelling of 13399905 in words is "thirteen million, three hundred ninety-nine thousand, nine hundred five".