12789517087 has 2 divisors, whose sum is σ = 12789517088. Its totient is φ = 12789517086.

The previous prime is 12789517021. The next prime is 12789517141. The reversal of 12789517087 is 78071598721.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12789517087 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12789517787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6394758543 + 6394758544.

It is an arithmetic number, because the mean of its divisors is an integer number (6394758544).

Almost surely, 2^12789517087 is an apocalyptic number.

12789517087 is a deficient number, since it is larger than the sum of its proper divisors (1).

12789517087 is an equidigital number, since it uses as much as digits as its factorization.

12789517087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1975680, while the sum is 55.

The spelling of 12789517087 in words is "twelve billion, seven hundred eighty-nine million, five hundred seventeen thousand, eighty-seven".