12784974569 has 2 divisors, whose sum is σ = 12784974570. Its totient is φ = 12784974568.

The previous prime is 12784974541. The next prime is 12784974577. The reversal of 12784974569 is 96547948721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9218496169 + 3566478400 = 96013^2 + 59720^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12784974569 is a prime.

It is a super-2 number, since 2×12784974569² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12784974589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6392487284 + 6392487285.

It is an arithmetic number, because the mean of its divisors is an integer number (6392487285).

Almost surely, 2^12784974569 is an apocalyptic number.

It is an amenable number.

12784974569 is a deficient number, since it is larger than the sum of its proper divisors (1).

12784974569 is an equidigital number, since it uses as much as digits as its factorization.

12784974569 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30481920, while the sum is 62.

The spelling of 12784974569 in words is "twelve billion, seven hundred eighty-four million, nine hundred seventy-four thousand, five hundred sixty-nine".