12923086861 has 2 divisors, whose sum is σ = 12923086862. Its totient is φ = 12923086860.

The previous prime is 12923086853. The next prime is 12923086871. The reversal of 12923086861 is 16868032921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12806317225 + 116769636 = 113165^2 + 10806^2 .

It is an emirp because it is prime and its reverse (16868032921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12923086861 - 2³ = 12923086853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12923086801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6461543430 + 6461543431.

It is an arithmetic number, because the mean of its divisors is an integer number (6461543431).

Almost surely, 2^12923086861 is an apocalyptic number.

It is an amenable number.

12923086861 is a deficient number, since it is larger than the sum of its proper divisors (1).

12923086861 is an equidigital number, since it uses as much as digits as its factorization.

12923086861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 248832, while the sum is 46.

The spelling of 12923086861 in words is "twelve billion, nine hundred twenty-three million, eighty-six thousand, eight hundred sixty-one".