129424129423 has 2 divisors, whose sum is σ = 129424129424. Its totient is φ = 129424129422.

The previous prime is 129424129399. The next prime is 129424129441. The reversal of 129424129423 is 324921424921.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129424129423 is a prime.

It is a super-3 number, since 3×129424129423³ (a number of 34 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 129424129423.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129424129123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64712064711 + 64712064712.

It is an arithmetic number, because the mean of its divisors is an integer number (64712064712).

Almost surely, 2^129424129423 is an apocalyptic number.

129424129423 is a deficient number, since it is larger than the sum of its proper divisors (1).

129424129423 is an equidigital number, since it uses as much as digits as its factorization.

129424129423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 248832, while the sum is 43.

The spelling of 129424129423 in words is "one hundred twenty-nine billion, four hundred twenty-four million, one hundred twenty-nine thousand, four hundred twenty-three".