999950129 has 2 divisors, whose sum is σ = 999950130. Its totient is φ = 999950128.

The previous prime is 999950111. The next prime is 999950141. The reversal of 999950129 is 921059999.

999950129 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 856908529 + 143041600 = 29273^2 + 11960^2 .

It is a cyclic number.

It is not a de Polignac number, because 999950129 - 2¹² = 999946033 is a prime.

It is not a weakly prime, because it can be changed into another prime (999950729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499975064 + 499975065.

It is an arithmetic number, because the mean of its divisors is an integer number (499975065).

Almost surely, 2^999950129 is an apocalyptic number.

It is an amenable number.

999950129 is a deficient number, since it is larger than the sum of its proper divisors (1).

999950129 is an equidigital number, since it uses as much as digits as its factorization.

999950129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 590490, while the sum is 53.

The square root of 999950129 is about 31621.9880621064. The cubic root of 999950129 is about 999.9833760570.

The spelling of 999950129 in words is "nine hundred ninety-nine million, nine hundred fifty thousand, one hundred twenty-nine".