12636399 has 8 divisors (see below), whose sum is σ = 16865920. Its totient is φ = 8415576.

The previous prime is 12636397. The next prime is 12636461. The reversal of 12636399 is 99363621.

12636399 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12636399 - 2¹ = 12636397 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 (12636397) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2934 + ... + 5820.

It is an arithmetic number, because the mean of its divisors is an integer number (2108240).

Almost surely, 2^12636399 is an apocalyptic number.

12636399 is a deficient number, since it is larger than the sum of its proper divisors (4229521).

12636399 is a wasteful number, since it uses less digits than its factorization.

12636399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4349.

The product of its digits is 52488, while the sum is 39.

The square root of 12636399 is about 3554.7713006606. The cubic root of 12636399 is about 232.9205338491.

The spelling of 12636399 in words is "twelve million, six hundred thirty-six thousand, three hundred ninety-nine".