13630321 has 4 divisors (see below), whose sum is σ = 13642992. Its totient is φ = 13617652.

The previous prime is 13630307. The next prime is 13630363. The reversal of 13630321 is 12303631.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13630321 - 2⁷ = 13630193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13630301) 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, 4555 + ... + 6928.

It is an arithmetic number, because the mean of its divisors is an integer number (3410748).

Almost surely, 2^13630321 is an apocalyptic number.

It is an amenable number.

13630321 is a deficient number, since it is larger than the sum of its proper divisors (12671).

13630321 is a wasteful number, since it uses less digits than its factorization.

13630321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12670.

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 13630321 is about 3691.9264618895. The cubic root of 13630321 is about 238.8738969339.

Adding to 13630321 its reverse (12303631), we get a palindrome (25933952).

The spelling of 13630321 in words is "thirteen million, six hundred thirty thousand, three hundred twenty-one".