196843391 has 12 divisors (see below), whose sum is σ = 209656440. Its totient is φ = 184775040.

The previous prime is 196843343. The next prime is 196843393. The reversal of 196843391 is 193348691.

It is not a de Polignac number, because 196843391 - 2⁶ = 196843327 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 (196843393) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 155720 + ... + 156978.

It is an arithmetic number, because the mean of its divisors is an integer number (17471370).

Almost surely, 2^196843391 is an apocalyptic number.

196843391 is a deficient number, since it is larger than the sum of its proper divisors (12813049).

196843391 is a wasteful number, since it uses less digits than its factorization.

196843391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1834 (or 1817 counting only the distinct ones).

The product of its digits is 139968, while the sum is 44.

The square root of 196843391 is about 14030.0887737747. The cubic root of 196843391 is about 581.7105576121.

The spelling of 196843391 in words is "one hundred ninety-six million, eight hundred forty-three thousand, three hundred ninety-one".