12761043989 has 2 divisors, whose sum is σ = 12761043990. Its totient is φ = 12761043988.

The previous prime is 12761043983. The next prime is 12761043991. The reversal of 12761043989 is 98934016721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8939702500 + 3821341489 = 94550^2 + 61817^2 .

It is an emirp because it is prime and its reverse (98934016721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12761043989 - 2¹⁶ = 12760978453 is a prime.

It is a Sophie Germain prime.

Together with 12761043991, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12761043983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6380521994 + 6380521995.

It is an arithmetic number, because the mean of its divisors is an integer number (6380521995).

Almost surely, 2^12761043989 is an apocalyptic number.

It is an amenable number.

12761043989 is a deficient number, since it is larger than the sum of its proper divisors (1).

12761043989 is an equidigital number, since it uses as much as digits as its factorization.

12761043989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 653184, while the sum is 50.

The spelling of 12761043989 in words is "twelve billion, seven hundred sixty-one million, forty-three thousand, nine hundred eighty-nine".