389521161 has 6 divisors (see below), whose sum is σ = 562641690. Its totient is φ = 259680768.

The previous prime is 389521129. The next prime is 389521199. The reversal of 389521161 is 161125983.

389521161 is a `hidden beast` number, since 389 + 5 + 211 + 61 = 666.

It can be written as a sum of positive squares in only one way, i.e., 352688400 + 36832761 = 18780^2 + 6069^2 .

It is not a de Polignac number, because 389521161 - 2⁵ = 389521129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (389525161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21640056 + ... + 21640073.

It is an arithmetic number, because the mean of its divisors is an integer number (93773615).

Almost surely, 2^389521161 is an apocalyptic number.

It is an amenable number.

389521161 is a deficient number, since it is larger than the sum of its proper divisors (173120529).

389521161 is a wasteful number, since it uses less digits than its factorization.

389521161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43280135 (or 43280132 counting only the distinct ones).

The product of its digits is 12960, while the sum is 36.

The square root of 389521161 is about 19736.2904569222. The cubic root of 389521161 is about 730.3152207176.

The spelling of 389521161 in words is "three hundred eighty-nine million, five hundred twenty-one thousand, one hundred sixty-one".