13630405 has 4 divisors (see below), whose sum is σ = 16356492. Its totient is φ = 10904320.

The previous prime is 13630403. The next prime is 13630411. The reversal of 13630405 is 50403631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50403631 = 67 ⋅752293.

It can be written as a sum of positive squares in 2 ways, for example, as 9541921 + 4088484 = 3089^2 + 2022^2 .

It is not a de Polignac number, because 13630405 - 2¹ = 13630403 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 (13630403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1363036 + ... + 1363045.

It is an arithmetic number, because the mean of its divisors is an integer number (4089123).

Almost surely, 2^13630405 is an apocalyptic number.

It is an amenable number.

13630405 is a deficient number, since it is larger than the sum of its proper divisors (2726087).

13630405 is an equidigital number, since it uses as much as digits as its factorization.

13630405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2726086.

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 13630405 is about 3691.9378380466. The cubic root of 13630405 is about 238.8743876381.

The spelling of 13630405 in words is "thirteen million, six hundred thirty thousand, four hundred five".