12331997 has 2 divisors, whose sum is σ = 12331998. Its totient is φ = 12331996.

The previous prime is 12331993. The next prime is 12332027. The reversal of 12331997 is 79913321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6446521 + 5885476 = 2539^2 + 2426^2 .

It is a cyclic number.

It is not a de Polignac number, because 12331997 - 2² = 12331993 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 (12331993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6165998 + 6165999.

It is an arithmetic number, because the mean of its divisors is an integer number (6165999).

Almost surely, 2^12331997 is an apocalyptic number.

It is an amenable number.

12331997 is a deficient number, since it is larger than the sum of its proper divisors (1).

12331997 is an equidigital number, since it uses as much as digits as its factorization.

12331997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10206, while the sum is 35.

The square root of 12331997 is about 3511.6943204100. The cubic root of 12331997 is about 231.0350140262.

The spelling of 12331997 in words is "twelve million, three hundred thirty-one thousand, nine hundred ninety-seven".