196928895421 has 2 divisors, whose sum is σ = 196928895422. Its totient is φ = 196928895420.

The previous prime is 196928895419. The next prime is 196928895463. The reversal of 196928895421 is 124598829691.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 104467289796 + 92461605625 = 323214^2 + 304075^2 .

It is a cyclic number.

It is not a de Polignac number, because 196928895421 - 2¹ = 196928895419 is a prime.

Together with 196928895419, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (196928898421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98464447710 + 98464447711.

It is an arithmetic number, because the mean of its divisors is an integer number (98464447711).

Almost surely, 2^196928895421 is an apocalyptic number.

It is an amenable number.

196928895421 is a deficient number, since it is larger than the sum of its proper divisors (1).

196928895421 is an equidigital number, since it uses as much as digits as its factorization.

196928895421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22394880, while the sum is 64.

The spelling of 196928895421 in words is "one hundred ninety-six billion, nine hundred twenty-eight million, eight hundred ninety-five thousand, four hundred twenty-one".