189208573 has 2 divisors, whose sum is σ = 189208574. Its totient is φ = 189208572.

The previous prime is 189208567. The next prime is 189208619. The reversal of 189208573 is 375802981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 169468324 + 19740249 = 13018^2 + 4443^2 .

It is an emirp because it is prime and its reverse (375802981) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 189208573 - 2⁵ = 189208541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189208073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94604286 + 94604287.

It is an arithmetic number, because the mean of its divisors is an integer number (94604287).

Almost surely, 2^189208573 is an apocalyptic number.

It is an amenable number.

189208573 is a deficient number, since it is larger than the sum of its proper divisors (1).

189208573 is an equidigital number, since it uses as much as digits as its factorization.

189208573 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120960, while the sum is 43.

The square root of 189208573 is about 13755.3107198638. The cubic root of 189208573 is about 574.0903808196.

The spelling of 189208573 in words is "one hundred eighty-nine million, two hundred eight thousand, five hundred seventy-three".