12297639 has 4 divisors (see below), whose sum is σ = 16396856. Its totient is φ = 8198424.

The previous prime is 12297631. The next prime is 12297667. The reversal of 12297639 is 93679221.

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

It is not a de Polignac number, because 12297639 - 2³ = 12297631 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12297597 and 12297606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12297631) 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, 2049604 + ... + 2049609.

It is an arithmetic number, because the mean of its divisors is an integer number (4099214).

Almost surely, 2^12297639 is an apocalyptic number.

12297639 is a deficient number, since it is larger than the sum of its proper divisors (4099217).

12297639 is an equidigital number, since it uses as much as digits as its factorization.

12297639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4099216.

The product of its digits is 40824, while the sum is 39.

The square root of 12297639 is about 3506.7989677197. The cubic root of 12297639 is about 230.8202533421.

The spelling of 12297639 in words is "twelve million, two hundred ninety-seven thousand, six hundred thirty-nine".