12428399717 has 4 divisors (see below), whose sum is σ = 12435372000. Its totient is φ = 12421427436.

The previous prime is 12428399707. The next prime is 12428399743. The reversal of 12428399717 is 71799382421.

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.

It is a cyclic number.

It is not a de Polignac number, because 12428399717 - 2⁶ = 12428399653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12428399707) 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, 3483467 + ... + 3487032.

It is an arithmetic number, because the mean of its divisors is an integer number (3108843000).

Almost surely, 2^12428399717 is an apocalyptic number.

It is an amenable number.

12428399717 is a deficient number, since it is larger than the sum of its proper divisors (6972283).

12428399717 is an equidigital number, since it uses as much as digits as its factorization.

12428399717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6972282.

The product of its digits is 1524096, while the sum is 53.

The spelling of 12428399717 in words is "twelve billion, four hundred twenty-eight million, three hundred ninety-nine thousand, seven hundred seventeen".