12428779793 has 2 divisors, whose sum is σ = 12428779794. Its totient is φ = 12428779792.

The previous prime is 12428779789. The next prime is 12428779799. The reversal of 12428779793 is 39797782421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12384796369 + 43983424 = 111287^2 + 6632^2 .

It is an emirp because it is prime and its reverse (39797782421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12428779793 - 2² = 12428779789 is a prime.

It is not a weakly prime, because it can be changed into another prime (12428779799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6214389896 + 6214389897.

It is an arithmetic number, because the mean of its divisors is an integer number (6214389897).

Almost surely, 2^12428779793 is an apocalyptic number.

It is an amenable number.

12428779793 is a deficient number, since it is larger than the sum of its proper divisors (1).

12428779793 is an equidigital number, since it uses as much as digits as its factorization.

12428779793 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10668672, while the sum is 59.

The spelling of 12428779793 in words is "twelve billion, four hundred twenty-eight million, seven hundred seventy-nine thousand, seven hundred ninety-three".