12971545723 has 4 divisors (see below), whose sum is σ = 13070565288. Its totient is φ = 12872526160.

The previous prime is 12971545721. The next prime is 12971545771. The reversal of 12971545723 is 32754517921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32754517921 = 41 ⋅798890681.

It is a cyclic number.

It is not a de Polignac number, because 12971545723 - 2¹ = 12971545721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12971545721) 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, 49509586 + ... + 49509847.

It is an arithmetic number, because the mean of its divisors is an integer number (3267641322).

Almost surely, 2^12971545723 is an apocalyptic number.

12971545723 is a deficient number, since it is larger than the sum of its proper divisors (99019565).

12971545723 is an equidigital number, since it uses as much as digits as its factorization.

12971545723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99019564.

The product of its digits is 529200, while the sum is 46.

The spelling of 12971545723 in words is "twelve billion, nine hundred seventy-one million, five hundred forty-five thousand, seven hundred twenty-three".