129718254893 has 2 divisors, whose sum is σ = 129718254894. Its totient is φ = 129718254892.

The previous prime is 129718254863. The next prime is 129718254901. The reversal of 129718254893 is 398452817921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72088491049 + 57629763844 = 268493^2 + 240062^2 .

It is a cyclic number.

It is not a de Polignac number, because 129718254893 - 2²⁴ = 129701477677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129718254863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64859127446 + 64859127447.

It is an arithmetic number, because the mean of its divisors is an integer number (64859127447).

Almost surely, 2^129718254893 is an apocalyptic number.

It is an amenable number.

129718254893 is a deficient number, since it is larger than the sum of its proper divisors (1).

129718254893 is an equidigital number, since it uses as much as digits as its factorization.

129718254893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8709120, while the sum is 59.

The spelling of 129718254893 in words is "one hundred twenty-nine billion, seven hundred eighteen million, two hundred fifty-four thousand, eight hundred ninety-three".