196488989 has 2 divisors, whose sum is σ = 196488990. Its totient is φ = 196488988.

The previous prime is 196488979. The next prime is 196488997. The reversal of 196488989 is 989884691.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121925764 + 74563225 = 11042^2 + 8635^2 .

It is an emirp because it is prime and its reverse (989884691) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-196488989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (196488979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98244494 + 98244495.

It is an arithmetic number, because the mean of its divisors is an integer number (98244495).

Almost surely, 2^196488989 is an apocalyptic number.

It is an amenable number.

196488989 is a deficient number, since it is larger than the sum of its proper divisors (1).

196488989 is an equidigital number, since it uses as much as digits as its factorization.

196488989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8957952, while the sum is 62.

The square root of 196488989 is about 14017.4530140108. The cubic root of 196488989 is about 581.3612389095.

The spelling of 196488989 in words is "one hundred ninety-six million, four hundred eighty-eight thousand, nine hundred eighty-nine".