189685209067 has 2 divisors, whose sum is σ = 189685209068. Its totient is φ = 189685209066.

The previous prime is 189685209053. The next prime is 189685209079. The reversal of 189685209067 is 760902586981.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-189685209067 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 189685208996 and 189685209014.

It is not a weakly prime, because it can be changed into another prime (189685203067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94842604533 + 94842604534.

It is an arithmetic number, because the mean of its divisors is an integer number (94842604534).

Almost surely, 2^189685209067 is an apocalyptic number.

189685209067 is a deficient number, since it is larger than the sum of its proper divisors (1).

189685209067 is an equidigital number, since it uses as much as digits as its factorization.

189685209067 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13063680, while the sum is 61.

The spelling of 189685209067 in words is "one hundred eighty-nine billion, six hundred eighty-five million, two hundred nine thousand, sixty-seven".