999980000029 has 2 divisors, whose sum is σ = 999980000030. Its totient is φ = 999980000028.

The previous prime is 999979999987. The next prime is 999980000087. The reversal of 999980000029 is 920000089999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 823683304900 + 176296695129 = 907570^2 + 419877^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-999980000029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999980006029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499990000014 + 499990000015.

It is an arithmetic number, because the mean of its divisors is an integer number (499990000015).

Almost surely, 2^999980000029 is an apocalyptic number.

It is an amenable number.

999980000029 is a deficient number, since it is larger than the sum of its proper divisors (1).

999980000029 is an equidigital number, since it uses as much as digits as its factorization.

999980000029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 944784, while the sum is 55.

The spelling of 999980000029 in words is "nine hundred ninety-nine billion, nine hundred eighty million, twenty-nine", and thus it is an aban number.