12969961449 has 4 divisors (see below), whose sum is σ = 17293281936. Its totient is φ = 8646640964.

The previous prime is 12969961447. The next prime is 12969961483. The reversal of 12969961449 is 94416996921.

12969961449 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 12969961449 - 2¹ = 12969961447 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12969961392 and 12969961401.

It is not an unprimeable number, because it can be changed into a prime (12969961447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2161660239 + ... + 2161660244.

It is an arithmetic number, because the mean of its divisors is an integer number (4323320484).

Almost surely, 2^12969961449 is an apocalyptic number.

It is an amenable number.

12969961449 is a deficient number, since it is larger than the sum of its proper divisors (4323320487).

12969961449 is an equidigital number, since it uses as much as digits as its factorization.

12969961449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4323320486.

The product of its digits is 7558272, while the sum is 60.

The spelling of 12969961449 in words is "twelve billion, nine hundred sixty-nine million, nine hundred sixty-one thousand, four hundred forty-nine".