189445073 has 2 divisors, whose sum is σ = 189445074. Its totient is φ = 189445072.

The previous prime is 189445063. The next prime is 189445097. The reversal of 189445073 is 370544981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 165071104 + 24373969 = 12848^2 + 4937^2 .

It is an emirp because it is prime and its reverse (370544981) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 189445073 - 2⁸ = 189444817 is a prime.

It is a super-3 number, since 3×189445073³ (a number of 26 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 189445073.

It is not a weakly prime, because it can be changed into another prime (189445063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94722536 + 94722537.

It is an arithmetic number, because the mean of its divisors is an integer number (94722537).

Almost surely, 2^189445073 is an apocalyptic number.

It is an amenable number.

189445073 is a deficient number, since it is larger than the sum of its proper divisors (1).

189445073 is an equidigital number, since it uses as much as digits as its factorization.

189445073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 189445073 is about 13763.9047148693. The cubic root of 189445073 is about 574.3294747164.

The spelling of 189445073 in words is "one hundred eighty-nine million, four hundred forty-five thousand, seventy-three".