129723916559 has 2 divisors, whose sum is σ = 129723916560. Its totient is φ = 129723916558.

The previous prime is 129723916549. The next prime is 129723916573. The reversal of 129723916559 is 955619327921.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 129723916559 - 2⁸ = 129723916303 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 129723916498 and 129723916507.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129723916549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64861958279 + 64861958280.

It is an arithmetic number, because the mean of its divisors is an integer number (64861958280).

Almost surely, 2^129723916559 is an apocalyptic number.

129723916559 is a deficient number, since it is larger than the sum of its proper divisors (1).

129723916559 is an equidigital number, since it uses as much as digits as its factorization.

129723916559 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9185400, while the sum is 59.

The spelling of 129723916559 in words is "one hundred twenty-nine billion, seven hundred twenty-three million, nine hundred sixteen thousand, five hundred fifty-nine".