12009997 has 2 divisors, whose sum is σ = 12009998. Its totient is φ = 12009996.

The previous prime is 12009971. The next prime is 12010013. The reversal of 12009997 is 79990021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10797796 + 1212201 = 3286^2 + 1101^2 .

It is a cyclic number.

It is not a de Polignac number, because 12009997 - 2⁷ = 12009869 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12009917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6004998 + 6004999.

It is an arithmetic number, because the mean of its divisors is an integer number (6004999).

Almost surely, 2^12009997 is an apocalyptic number.

It is an amenable number.

12009997 is a deficient number, since it is larger than the sum of its proper divisors (1).

12009997 is an equidigital number, since it uses as much as digits as its factorization.

12009997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10206, while the sum is 37.

The square root of 12009997 is about 3465.5442574003. The cubic root of 12009997 is about 229.0064070212.

The spelling of 12009997 in words is "twelve million, nine thousand, nine hundred ninety-seven".