129361423 has 2 divisors, whose sum is σ = 129361424. Its totient is φ = 129361422.

The previous prime is 129361399. The next prime is 129361433. The reversal of 129361423 is 324163921.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129361423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129361433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64680711 + 64680712.

It is an arithmetic number, because the mean of its divisors is an integer number (64680712).

Almost surely, 2^129361423 is an apocalyptic number.

129361423 is a deficient number, since it is larger than the sum of its proper divisors (1).

129361423 is an equidigital number, since it uses as much as digits as its factorization.

129361423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 31.

The square root of 129361423 is about 11373.7163231725. The cubic root of 129361423 is about 505.7488781362.

The spelling of 129361423 in words is "one hundred twenty-nine million, three hundred sixty-one thousand, four hundred twenty-three".