196784421 has 16 divisors (see below), whose sum is σ = 266549184. Its totient is φ = 129112704.

The previous prime is 196784417. The next prime is 196784431. The reversal of 196784421 is 124487691.

It is not a de Polignac number, because 196784421 - 2² = 196784417 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (196784431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 165190 + ... + 166376.

It is an arithmetic number, because the mean of its divisors is an integer number (16659324).

Almost surely, 2^196784421 is an apocalyptic number.

It is an amenable number.

196784421 is a deficient number, since it is larger than the sum of its proper divisors (69764763).

196784421 is a wasteful number, since it uses less digits than its factorization.

196784421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2020.

The product of its digits is 96768, while the sum is 42.

The square root of 196784421 is about 14027.9870615851. The cubic root of 196784421 is about 581.6524625320.

The spelling of 196784421 in words is "one hundred ninety-six million, seven hundred eighty-four thousand, four hundred twenty-one".