13638074 has 4 divisors (see below), whose sum is σ = 20457114. Its totient is φ = 6819036.

The previous prime is 13638073. The next prime is 13638077. The reversal of 13638074 is 47083631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 47083631 = 7 ⋅6726233.

It can be written as a sum of positive squares in only one way, i.e., 11055625 + 2582449 = 3325^2 + 1607^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 13638074.

It is not an unprimeable number, because it can be changed into a prime (13638073) 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 as a sum of consecutive naturals, namely, 3409517 + ... + 3409520.

Almost surely, 2^13638074 is an apocalyptic number.

13638074 is a deficient number, since it is larger than the sum of its proper divisors (6819040).

13638074 is an equidigital number, since it uses as much as digits as its factorization.

13638074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6819039.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 13638074 is about 3692.9763064499. The cubic root of 13638074 is about 238.9191792691.

The spelling of 13638074 in words is "thirteen million, six hundred thirty-eight thousand, seventy-four".