12438171793 has 2 divisors, whose sum is σ = 12438171794. Its totient is φ = 12438171792.

The previous prime is 12438171773. The next prime is 12438171871. The reversal of 12438171793 is 39717183421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11975362624 + 462809169 = 109432^2 + 21513^2 .

It is a cyclic number.

It is not a de Polignac number, because 12438171793 - 2¹⁷ = 12438040721 is a prime.

It is not a weakly prime, because it can be changed into another prime (12438171773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6219085896 + 6219085897.

It is an arithmetic number, because the mean of its divisors is an integer number (6219085897).

Almost surely, 2^12438171793 is an apocalyptic number.

It is an amenable number.

12438171793 is a deficient number, since it is larger than the sum of its proper divisors (1).

12438171793 is an equidigital number, since it uses as much as digits as its factorization.

12438171793 is an evil number, because the sum of its binary digits is even.

The product of its digits is 254016, while the sum is 46.

The spelling of 12438171793 in words is "twelve billion, four hundred thirty-eight million, one hundred seventy-one thousand, seven hundred ninety-three".