189452161 has 4 divisors (see below), whose sum is σ = 189727024. Its totient is φ = 189177300.

The previous prime is 189452147. The next prime is 189452177. The reversal of 189452161 is 161254981.

189452161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 189452161 - 2¹⁷ = 189321089 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 189452161.

It is not an unprimeable number, because it can be changed into a prime (189452101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136395 + ... + 137776.

It is an arithmetic number, because the mean of its divisors is an integer number (47431756).

Almost surely, 2^189452161 is an apocalyptic number.

It is an amenable number.

189452161 is a deficient number, since it is larger than the sum of its proper divisors (274863).

189452161 is an equidigital number, since it uses as much as digits as its factorization.

189452161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274862.

The product of its digits is 17280, while the sum is 37.

The square root of 189452161 is about 13764.1621975331. The cubic root of 189452161 is about 574.3366373845.

The spelling of 189452161 in words is "one hundred eighty-nine million, four hundred fifty-two thousand, one hundred sixty-one".