12207997 has 4 divisors (see below), whose sum is σ = 12219516. Its totient is φ = 12196480.

The previous prime is 12207977. The next prime is 12208019. The reversal of 12207997 is 79970221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79970221 = 19 ⋅4208959.

It can be written as a sum of positive squares in 2 ways, for example, as 5597956 + 6610041 = 2366^2 + 2571^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12207997 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 (12207977) 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, 3988 + ... + 6349.

It is an arithmetic number, because the mean of its divisors is an integer number (3054879).

Almost surely, 2^12207997 is an apocalyptic number.

It is an amenable number.

12207997 is a deficient number, since it is larger than the sum of its proper divisors (11519).

12207997 is a wasteful number, since it uses less digits than its factorization.

12207997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11518.

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

The square root of 12207997 is about 3493.9944189995. The cubic root of 12207997 is about 230.2580405747.

The spelling of 12207997 in words is "twelve million, two hundred seven thousand, nine hundred ninety-seven".