12378097 has 4 divisors (see below), whose sum is σ = 12611700. Its totient is φ = 12144496.

The previous prime is 12378077. The next prime is 12378103. The reversal of 12378097 is 79087321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79087321 = 29 ⋅2727149.

It can be written as a sum of positive squares in 2 ways, for example, as 10916416 + 1461681 = 3304^2 + 1209^2 .

It is a cyclic number.

It is not a de Polignac number, because 12378097 - 2⁷ = 12377969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12378007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 116722 + ... + 116827.

It is an arithmetic number, because the mean of its divisors is an integer number (3152925).

Almost surely, 2^12378097 is an apocalyptic number.

It is an amenable number.

12378097 is a deficient number, since it is larger than the sum of its proper divisors (233603).

12378097 is an equidigital number, since it uses as much as digits as its factorization.

12378097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233602.

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 12378097 is about 3518.2519807427. The cubic root of 12378097 is about 231.3225443694.

The spelling of 12378097 in words is "twelve million, three hundred seventy-eight thousand, ninety-seven".