189952161 has 16 divisors (see below), whose sum is σ = 289728384. Its totient is φ = 108440064.

The previous prime is 189952157. The next prime is 189952171. The reversal of 189952161 is 161259981.

It is not a de Polignac number, because 189952161 - 2² = 189952157 is a prime.

It is not an unprimeable number, because it can be changed into a prime (189952141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21745 + ... + 29201.

It is an arithmetic number, because the mean of its divisors is an integer number (18108024).

Almost surely, 2^189952161 is an apocalyptic number.

It is an amenable number.

189952161 is a deficient number, since it is larger than the sum of its proper divisors (99776223).

189952161 is a wasteful number, since it uses less digits than its factorization.

189952161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8680.

The product of its digits is 38880, while the sum is 42.

The square root of 189952161 is about 13782.3133399295. The cubic root of 189952161 is about 574.8414544607.

The spelling of 189952161 in words is "one hundred eighty-nine million, nine hundred fifty-two thousand, one hundred sixty-one".