12398447819 has 8 divisors (see below), whose sum is σ = 12421828848. Its totient is φ = 12375089280.

The previous prime is 12398447779. The next prime is 12398447821. The reversal of 12398447819 is 91874489321.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12398447819 is a prime.

It is a super-2 number, since 2×12398447819² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12398447869) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1415684 + ... + 1424414.

It is an arithmetic number, because the mean of its divisors is an integer number (1552728606).

Almost surely, 2^12398447819 is an apocalyptic number.

12398447819 is a deficient number, since it is larger than the sum of its proper divisors (23381029).

12398447819 is an equidigital number, since it uses as much as digits as its factorization.

12398447819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11245.

The product of its digits is 3483648, while the sum is 56.

The spelling of 12398447819 in words is "twelve billion, three hundred ninety-eight million, four hundred forty-seven thousand, eight hundred nineteen".