12009397 has 4 divisors (see below), whose sum is σ = 12018700. Its totient is φ = 12000096.

The previous prime is 12009383. The next prime is 12009407. The reversal of 12009397 is 79390021.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 9156676 + 2852721 = 3026^2 + 1689^2 .

It is a cyclic number.

It is not a de Polignac number, because 12009397 - 2¹¹ = 12007349 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 (12009337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2328 + ... + 5425.

It is an arithmetic number, because the mean of its divisors is an integer number (3004675).

Almost surely, 2^12009397 is an apocalyptic number.

It is an amenable number.

12009397 is a deficient number, since it is larger than the sum of its proper divisors (9303).

12009397 is an equidigital number, since it uses as much as digits as its factorization.

12009397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9302.

The product of its (nonzero) digits is 3402, while the sum is 31.

The square root of 12009397 is about 3465.4576898297. The cubic root of 12009397 is about 229.0025933613.

The spelling of 12009397 in words is "twelve million, nine thousand, three hundred ninety-seven".