196312189 has 4 divisors (see below), whose sum is σ = 198336124. Its totient is φ = 194288256.

The previous prime is 196312187. The next prime is 196312201. The reversal of 196312189 is 981213691.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 981213691 = 113 ⋅8683307.

It can be written as a sum of positive squares in 2 ways, for example, as 45832900 + 150479289 = 6770^2 + 12267^2 .

It is a cyclic number.

It is not a de Polignac number, because 196312189 - 2¹ = 196312187 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (196312183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1011822 + ... + 1012015.

It is an arithmetic number, because the mean of its divisors is an integer number (49584031).

Almost surely, 2^196312189 is an apocalyptic number.

It is an amenable number.

196312189 is a deficient number, since it is larger than the sum of its proper divisors (2023935).

196312189 is an equidigital number, since it uses as much as digits as its factorization.

196312189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2023934.

The product of its digits is 23328, while the sum is 40.

The square root of 196312189 is about 14011.1451708988. The cubic root of 196312189 is about 581.1868177517.

The spelling of 196312189 in words is "one hundred ninety-six million, three hundred twelve thousand, one hundred eighty-nine".