12209797 has 4 divisors (see below), whose sum is σ = 12217036. Its totient is φ = 12202560.

The previous prime is 12209777. The next prime is 12209809. The reversal of 12209797 is 79790221.

12209797 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 1653796 + 10556001 = 1286^2 + 3249^2 .

It is a cyclic number.

It is not a de Polignac number, because 12209797 - 2¹⁵ = 12177029 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 (12209737) 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, 397 + ... + 4957.

It is an arithmetic number, because the mean of its divisors is an integer number (3054259).

Almost surely, 2^12209797 is an apocalyptic number.

It is an amenable number.

12209797 is a deficient number, since it is larger than the sum of its proper divisors (7239).

12209797 is an equidigital number, since it uses as much as digits as its factorization.

12209797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7238.

The product of its (nonzero) digits is 15876, while the sum is 37.

The square root of 12209797 is about 3494.2519943473. The cubic root of 12209797 is about 230.2693567665.

The spelling of 12209797 in words is "twelve million, two hundred nine thousand, seven hundred ninety-seven".