13965905 has 4 divisors (see below), whose sum is σ = 16759092. Its totient is φ = 11172720.

The previous prime is 13965901. The next prime is 13965937. The reversal of 13965905 is 50956931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50956931 = 107 ⋅476233.

It can be written as a sum of positive squares in 2 ways, for example, as 7529536 + 6436369 = 2744^2 + 2537^2 .

It is not a de Polignac number, because 13965905 - 2² = 13965901 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13965901) 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 3 ways as a sum of consecutive naturals, for example, 1396586 + ... + 1396595.

It is an arithmetic number, because the mean of its divisors is an integer number (4189773).

Almost surely, 2^13965905 is an apocalyptic number.

It is an amenable number.

13965905 is a deficient number, since it is larger than the sum of its proper divisors (2793187).

13965905 is an equidigital number, since it uses as much as digits as its factorization.

13965905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2793186.

The product of its (nonzero) digits is 36450, while the sum is 38.

The square root of 13965905 is about 3737.0984734149. The cubic root of 13965905 is about 240.8184154689.

The spelling of 13965905 in words is "thirteen million, nine hundred sixty-five thousand, nine hundred five".