12312997 has 4 divisors (see below), whose sum is σ = 12613356. Its totient is φ = 12012640.

The previous prime is 12312991. The next prime is 12313003. The reversal of 12312997 is 79921321.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79921321 = 157 ⋅509053.

It is an interprime number because it is at equal distance from previous prime (12312991) and next prime (12313003).

It can be written as a sum of positive squares in 2 ways, for example, as 160801 + 12152196 = 401^2 + 3486^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12312997 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12312991) 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, 150118 + ... + 150199.

It is an arithmetic number, because the mean of its divisors is an integer number (3153339).

Almost surely, 2^12312997 is an apocalyptic number.

It is an amenable number.

12312997 is a deficient number, since it is larger than the sum of its proper divisors (300359).

12312997 is an equidigital number, since it uses as much as digits as its factorization.

12312997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300358.

The product of its digits is 6804, while the sum is 34.

The square root of 12312997 is about 3508.9880307576. The cubic root of 12312997 is about 230.9163005798.

The spelling of 12312997 in words is "twelve million, three hundred twelve thousand, nine hundred ninety-seven".