129026943391 has 2 divisors, whose sum is σ = 129026943392. Its totient is φ = 129026943390.

The previous prime is 129026943329. The next prime is 129026943401. The reversal of 129026943391 is 193349620921.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 129026943391 - 2²⁵ = 128993388959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129026943491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64513471695 + 64513471696.

It is an arithmetic number, because the mean of its divisors is an integer number (64513471696).

Almost surely, 2^129026943391 is an apocalyptic number.

129026943391 is a deficient number, since it is larger than the sum of its proper divisors (1).

129026943391 is an equidigital number, since it uses as much as digits as its factorization.

129026943391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 629856, while the sum is 49.

The spelling of 129026943391 in words is "one hundred twenty-nine billion, twenty-six million, nine hundred forty-three thousand, three hundred ninety-one".