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189573221 is a prime number
BaseRepresentation
bin10110100110010…
…10100001100101
3111012201022120102
423103022201211
5342012320341
630451113445
74461226415
oct1323124145
9435638512
10189573221
1198011192
12535a2885
1330376406
141b26a645
1511999c9b
hexb4ca865

189573221 has 2 divisors, whose sum is σ = 189573222. Its totient is φ = 189573220.

The previous prime is 189573193. The next prime is 189573259. The reversal of 189573221 is 122375981.

It is an a-pointer prime, because the next prime (189573259) can be obtained adding 189573221 to its sum of digits (38).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 120450625 + 69122596 = 10975^2 + 8314^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-189573221 is a prime.

It is a super-2 number, since 2×1895732212 = 71876012240629682, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189573721) 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, 94786610 + 94786611.

It is an arithmetic number, because the mean of its divisors is an integer number (94786611).

Almost surely, 2189573221 is an apocalyptic number.

It is an amenable number.

189573221 is a deficient number, since it is larger than the sum of its proper divisors (1).

189573221 is an equidigital number, since it uses as much as digits as its factorization.

189573221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30240, while the sum is 38.

The square root of 189573221 is about 13768.5591475652. The cubic root of 189573221 is about 574.4589451102.

The spelling of 189573221 in words is "one hundred eighty-nine million, five hundred seventy-three thousand, two hundred twenty-one".