13634641 has 4 divisors (see below), whose sum is σ = 13652032. Its totient is φ = 13617252.

The previous prime is 13634639. The next prime is 13634681. The reversal of 13634641 is 14643631.

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, and also an emirpimes, since its reverse is a distinct semiprime: 14643631 = 419 ⋅34949.

It is a cyclic number.

It is not a de Polignac number, because 13634641 - 2¹ = 13634639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13634681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7461 + ... + 9106.

It is an arithmetic number, because the mean of its divisors is an integer number (3413008).

Almost surely, 2^13634641 is an apocalyptic number.

It is an amenable number.

13634641 is a deficient number, since it is larger than the sum of its proper divisors (17391).

13634641 is an equidigital number, since it uses as much as digits as its factorization.

13634641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17390.

The product of its digits is 5184, while the sum is 28.

The square root of 13634641 is about 3692.5114759470. The cubic root of 13634641 is about 238.8991305346.

The spelling of 13634641 in words is "thirteen million, six hundred thirty-four thousand, six hundred forty-one".