12381097249 has 4 divisors (see below), whose sum is σ = 12421426864. Its totient is φ = 12340767636.

The previous prime is 12381097241. The next prime is 12381097279. The reversal of 12381097249 is 94279018321.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 94279018321 = 83 ⋅1135891787.

It is a cyclic number.

It is not a de Polignac number, because 12381097249 - 2³ = 12381097241 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12381097199 and 12381097208.

It is not an unprimeable number, because it can be changed into a prime (12381097241) 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, 20164347 + ... + 20164960.

It is an arithmetic number, because the mean of its divisors is an integer number (3105356716).

Almost surely, 2^12381097249 is an apocalyptic number.

It is an amenable number.

12381097249 is a deficient number, since it is larger than the sum of its proper divisors (40329615).

12381097249 is an equidigital number, since it uses as much as digits as its factorization.

12381097249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40329614.

The product of its (nonzero) digits is 217728, while the sum is 46.

The spelling of 12381097249 in words is "twelve billion, three hundred eighty-one million, ninety-seven thousand, two hundred forty-nine".