196889161 has 4 divisors (see below), whose sum is σ = 225016192. Its totient is φ = 168762132.

The previous prime is 196889129. The next prime is 196889171. The reversal of 196889161 is 161988691.

It is a happy number.

196889161 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, and also an emirpimes, since its reverse is a distinct semiprime: 161988691 = 107 ⋅1513913.

It is not a de Polignac number, because 196889161 - 2⁵ = 196889129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (196889111) 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, 14063505 + ... + 14063518.

It is an arithmetic number, because the mean of its divisors is an integer number (56254048).

Almost surely, 2^196889161 is an apocalyptic number.

It is an amenable number.

196889161 is a deficient number, since it is larger than the sum of its proper divisors (28127031).

196889161 is an equidigital number, since it uses as much as digits as its factorization.

196889161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28127030.

The product of its digits is 186624, while the sum is 49.

The square root of 196889161 is about 14031.7198161879. The cubic root of 196889161 is about 581.7556405394.

The spelling of 196889161 in words is "one hundred ninety-six million, eight hundred eighty-nine thousand, one hundred sixty-one".