196648889 has 2 divisors, whose sum is σ = 196648890. Its totient is φ = 196648888.

The previous prime is 196648871. The next prime is 196648897. The reversal of 196648889 is 988846691.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 164352400 + 32296489 = 12820^2 + 5683^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-196648889 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (196648189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98324444 + 98324445.

It is an arithmetic number, because the mean of its divisors is an integer number (98324445).

Almost surely, 2^196648889 is an apocalyptic number.

It is an amenable number.

196648889 is a deficient number, since it is larger than the sum of its proper divisors (1).

196648889 is an equidigital number, since it uses as much as digits as its factorization.

196648889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5971968, while the sum is 59.

The square root of 196648889 is about 14023.1554580273. The cubic root of 196648889 is about 581.5188973743.

The spelling of 196648889 in words is "one hundred ninety-six million, six hundred forty-eight thousand, eight hundred eighty-nine".