199919129 has 2 divisors, whose sum is σ = 199919130. Its totient is φ = 199919128.

The previous prime is 199919123. The next prime is 199919149. The reversal of 199919129 is 921919991.

199919129 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 147573904 + 52345225 = 12148^2 + 7235^2 .

It is a cyclic number.

It is not a de Polignac number, because 199919129 - 2¹⁶ = 199853593 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (199919123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99959564 + 99959565.

It is an arithmetic number, because the mean of its divisors is an integer number (99959565).

Almost surely, 2^199919129 is an apocalyptic number.

It is an amenable number.

199919129 is a deficient number, since it is larger than the sum of its proper divisors (1).

199919129 is an equidigital number, since it uses as much as digits as its factorization.

199919129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 118098, while the sum is 50.

The square root of 199919129 is about 14139.2761130123. The cubic root of 199919129 is about 584.7247142699.

The spelling of 199919129 in words is "one hundred ninety-nine million, nine hundred nineteen thousand, one hundred twenty-nine".