13996405 has 4 divisors (see below), whose sum is σ = 16795692. Its totient is φ = 11197120.

The previous prime is 13996403. The next prime is 13996427. The reversal of 13996405 is 50469931.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9678321 + 4318084 = 3111^2 + 2078^2 .

It is not a de Polignac number, because 13996405 - 2¹ = 13996403 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13996403) 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, 1399636 + ... + 1399645.

It is an arithmetic number, because the mean of its divisors is an integer number (4198923).

Almost surely, 2^13996405 is an apocalyptic number.

It is an amenable number.

13996405 is a deficient number, since it is larger than the sum of its proper divisors (2799287).

13996405 is an equidigital number, since it uses as much as digits as its factorization.

13996405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2799286.

The product of its (nonzero) digits is 29160, while the sum is 37.

The square root of 13996405 is about 3741.1769538475. The cubic root of 13996405 is about 240.9935949814.

The spelling of 13996405 in words is "thirteen million, nine hundred ninety-six thousand, four hundred five".