196491 has 4 divisors (see below), whose sum is σ = 261992. Its totient is φ = 130992.

The previous prime is 196477. The next prime is 196499. The reversal of 196491 is 194691.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 196491 - 2⁵ = 196459 is a prime.

It is a D-number.

It is a Duffinian number.

It is a plaindrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (196499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32746 + ... + 32751.

It is an arithmetic number, because the mean of its divisors is an integer number (65498).

2¹⁹⁶⁴⁹¹ is an apocalyptic number.

196491 is a deficient number, since it is larger than the sum of its proper divisors (65501).

196491 is an equidigital number, since it uses as much as digits as its factorization.

196491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65500.

The product of its digits is 1944, while the sum is 30.

The square root of 196491 is about 443.2730535460. The cubic root of 196491 is about 58.1363222250.

The spelling of 196491 in words is "one hundred ninety-six thousand, four hundred ninety-one".