12547051969 has 2 divisors, whose sum is σ = 12547051970. Its totient is φ = 12547051968.

The previous prime is 12547051967. The next prime is 12547051973. The reversal of 12547051969 is 96915074521.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12362771344 + 184280625 = 111188^2 + 13575^2 .

It is a cyclic number.

It is not a de Polignac number, because 12547051969 - 2¹ = 12547051967 is a prime.

It is a super-2 number, since 2×12547051969² (a number of 21 digits) contains 22 as substring.

Together with 12547051967, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (12547051967) 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, 6273525984 + 6273525985.

It is an arithmetic number, because the mean of its divisors is an integer number (6273525985).

Almost surely, 2^12547051969 is an apocalyptic number.

It is an amenable number.

12547051969 is a deficient number, since it is larger than the sum of its proper divisors (1).

12547051969 is an equidigital number, since it uses as much as digits as its factorization.

12547051969 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 680400, while the sum is 49.

The spelling of 12547051969 in words is "twelve billion, five hundred forty-seven million, fifty-one thousand, nine hundred sixty-nine".