129270758417 has 2 divisors, whose sum is σ = 129270758418. Its totient is φ = 129270758416.

The previous prime is 129270758339. The next prime is 129270758447. The reversal of 129270758417 is 714857072921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 117867935761 + 11402822656 = 343319^2 + 106784^2 .

It is a cyclic number.

It is not a de Polignac number, because 129270758417 - 2²² = 129266564113 is a prime.

It is not a weakly prime, because it can be changed into another prime (129270758447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64635379208 + 64635379209.

It is an arithmetic number, because the mean of its divisors is an integer number (64635379209).

Almost surely, 2^129270758417 is an apocalyptic number.

It is an amenable number.

129270758417 is a deficient number, since it is larger than the sum of its proper divisors (1).

129270758417 is an equidigital number, since it uses as much as digits as its factorization.

129270758417 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 53.

The spelling of 129270758417 in words is "one hundred twenty-nine billion, two hundred seventy million, seven hundred fifty-eight thousand, four hundred seventeen".