189420047 has 2 divisors, whose sum is σ = 189420048. Its totient is φ = 189420046.

The previous prime is 189420037. The next prime is 189420097. The reversal of 189420047 is 740024981.

It is a weak prime.

It is an emirp because it is prime and its reverse (740024981) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 189420047 - 2¹² = 189415951 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 189419989 and 189420016.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189420017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94710023 + 94710024.

It is an arithmetic number, because the mean of its divisors is an integer number (94710024).

Almost surely, 2^189420047 is an apocalyptic number.

189420047 is a deficient number, since it is larger than the sum of its proper divisors (1).

189420047 is an equidigital number, since it uses as much as digits as its factorization.

189420047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 189420047 is about 13762.9955678261. The cubic root of 189420047 is about 574.3041836524.

The spelling of 189420047 in words is "one hundred eighty-nine million, four hundred twenty thousand, forty-seven".