12961424947 has 4 divisors (see below), whose sum is σ = 12961733680. Its totient is φ = 12961116216.

The previous prime is 12961424939. The next prime is 12961424963. The reversal of 12961424947 is 74942416921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74942416921 = 4643 ⋅16140947.

It is a cyclic number.

It is not a de Polignac number, because 12961424947 - 2³ = 12961424939 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12961424947.

It is not an unprimeable number, because it can be changed into a prime (12961424447) 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, 79188 + ... + 179425.

It is an arithmetic number, because the mean of its divisors is an integer number (3240433420).

Almost surely, 2^12961424947 is an apocalyptic number.

12961424947 is a deficient number, since it is larger than the sum of its proper divisors (308733).

12961424947 is an equidigital number, since it uses as much as digits as its factorization.

12961424947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308732.

The product of its digits is 870912, while the sum is 49.

The spelling of 12961424947 in words is "twelve billion, nine hundred sixty-one million, four hundred twenty-four thousand, nine hundred forty-seven".