12817009193 has 8 divisors (see below), whose sum is σ = 12843610248. Its totient is φ = 12790427904.

The previous prime is 12817009129. The next prime is 12817009199. The reversal of 12817009193 is 39190071821.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 427538329 + 12389470864 = 20677^2 + 111308^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 12817009193 - 2⁶ = 12817009129 is a prime.

It is a super-2 number, since 2×12817009193² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12817009193.

It is not an unprimeable number, because it can be changed into a prime (12817009199) 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, 2373905 + ... + 2379297.

It is an arithmetic number, because the mean of its divisors is an integer number (1605451281).

Almost surely, 2^12817009193 is an apocalyptic number.

It is an amenable number.

12817009193 is a deficient number, since it is larger than the sum of its proper divisors (26601055).

12817009193 is an equidigital number, since it uses as much as digits as its factorization.

12817009193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9883.

The product of its (nonzero) digits is 27216, while the sum is 41.

The spelling of 12817009193 in words is "twelve billion, eight hundred seventeen million, nine thousand, one hundred ninety-three".