12357997 has 4 divisors (see below), whose sum is σ = 13084956. Its totient is φ = 11631040.

The previous prime is 12357977. The next prime is 12358001. The reversal of 12357997 is 79975321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79975321 = 1487 ⋅53783.

It can be written as a sum of positive squares in 2 ways, for example, as 9326916 + 3031081 = 3054^2 + 1741^2 .

It is a cyclic number.

It is not a de Polignac number, because 12357997 - 2⁷ = 12357869 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 (12357907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 363454 + ... + 363487.

It is an arithmetic number, because the mean of its divisors is an integer number (3271239).

Almost surely, 2^12357997 is an apocalyptic number.

12357997 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

12357997 is a deficient number, since it is larger than the sum of its proper divisors (726959).

12357997 is an equidigital number, since it uses as much as digits as its factorization.

12357997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 726958.

The product of its digits is 119070, while the sum is 43.

The square root of 12357997 is about 3515.3942879853. The cubic root of 12357997 is about 231.1972665733.

The spelling of 12357997 in words is "twelve million, three hundred fifty-seven thousand, nine hundred ninety-seven".