12723342979877 has 2 divisors, whose sum is σ = 12723342979878. Its totient is φ = 12723342979876.

The previous prime is 12723342979849. The next prime is 12723342979909. The reversal of 12723342979877 is 77897924332721.

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., 9938830013281 + 2784512966596 = 3152591^2 + 1668686^2 .

It is a cyclic number.

It is not a de Polignac number, because 12723342979877 - 2⁸ = 12723342979621 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12723342979877.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12723342979777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6361671489938 + 6361671489939.

It is an arithmetic number, because the mean of its divisors is an integer number (6361671489939).

Almost surely, 2^{12723342979877} is an apocalyptic number.

It is an amenable number.

12723342979877 is a deficient number, since it is larger than the sum of its proper divisors (1).

12723342979877 is an equidigital number, since it uses as much as digits as its factorization.

12723342979877 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 448084224, while the sum is 71.

The spelling of 12723342979877 in words is "twelve trillion, seven hundred twenty-three billion, three hundred forty-two million, nine hundred seventy-nine thousand, eight hundred seventy-seven".