12192639 has 4 divisors (see below), whose sum is σ = 16256856. Its totient is φ = 8128424.

The previous prime is 12192637. The next prime is 12192643. The reversal of 12192639 is 93629121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12192639 - 2¹ = 12192637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12192637) 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, 2032104 + ... + 2032109.

It is an arithmetic number, because the mean of its divisors is an integer number (4064214).

Almost surely, 2^12192639 is an apocalyptic number.

12192639 is a deficient number, since it is larger than the sum of its proper divisors (4064217).

12192639 is an equidigital number, since it uses as much as digits as its factorization.

12192639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4064216.

The product of its digits is 5832, while the sum is 33.

The square root of 12192639 is about 3491.7959562380. The cubic root of 12192639 is about 230.1614430481.

The spelling of 12192639 in words is "twelve million, one hundred ninety-two thousand, six hundred thirty-nine".