189609983929 has 2 divisors, whose sum is σ = 189609983930. Its totient is φ = 189609983928.

The previous prime is 189609983923. The next prime is 189609983963. The reversal of 189609983929 is 929389906981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 185722212025 + 3887771904 = 430955^2 + 62352^2 .

It is a cyclic number.

It is not a de Polignac number, because 189609983929 - 2⁹ = 189609983417 is a prime.

It is not a weakly prime, because it can be changed into another prime (189609983923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94804991964 + 94804991965.

It is an arithmetic number, because the mean of its divisors is an integer number (94804991965).

Almost surely, 2^189609983929 is an apocalyptic number.

It is an amenable number.

189609983929 is a deficient number, since it is larger than the sum of its proper divisors (1).

189609983929 is an equidigital number, since it uses as much as digits as its factorization.

189609983929 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 136048896, while the sum is 73.

The spelling of 189609983929 in words is "one hundred eighty-nine billion, six hundred nine million, nine hundred eighty-three thousand, nine hundred twenty-nine".