99999995129 has 2 divisors, whose sum is σ = 99999995130. Its totient is φ = 99999995128.

The previous prime is 99999995087. The next prime is 99999995197. The reversal of 99999995129 is 92159999999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64760070400 + 35239924729 = 254480^2 + 187723^2 .

It is a cyclic number.

It is not a de Polignac number, because 99999995129 - 2¹² = 99999991033 is a prime.

It is not a weakly prime, because it can be changed into another prime (99999995629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49999997564 + 49999997565.

It is an arithmetic number, because the mean of its divisors is an integer number (49999997565).

Almost surely, 2^99999995129 is an apocalyptic number.

It is an amenable number.

99999995129 is a deficient number, since it is larger than the sum of its proper divisors (1).

99999995129 is an equidigital number, since it uses as much as digits as its factorization.

99999995129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 430467210, while the sum is 80.

The spelling of 99999995129 in words is "ninety-nine billion, nine hundred ninety-nine million, nine hundred ninety-five thousand, one hundred twenty-nine".