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189849161 is a prime number
BaseRepresentation
bin10110101000011…
…01111001001001
3111020020100002102
423110031321021
5342100133121
630501043145
74463456045
oct1324157111
9436210072
10189849161
119818a537
12536b64b5
1330441ba8
141b2dd025
1511a0190b
hexb50de49

189849161 has 2 divisors, whose sum is σ = 189849162. Its totient is φ = 189849160.

The previous prime is 189849151. The next prime is 189849173. The reversal of 189849161 is 161948981.

189849161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 177289225 + 12559936 = 13315^2 + 3544^2 .

It is a cyclic number.

It is not a de Polignac number, because 189849161 - 210 = 189848137 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (189849151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94924580 + 94924581.

It is an arithmetic number, because the mean of its divisors is an integer number (94924581).

Almost surely, 2189849161 is an apocalyptic number.

It is an amenable number.

189849161 is a deficient number, since it is larger than the sum of its proper divisors (1).

189849161 is an equidigital number, since it uses as much as digits as its factorization.

189849161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 124416, while the sum is 47.

The square root of 189849161 is about 13778.5761601118. The cubic root of 189849161 is about 574.7375346553.

The spelling of 189849161 in words is "one hundred eighty-nine million, eight hundred forty-nine thousand, one hundred sixty-one".