196630549 has 2 divisors, whose sum is σ = 196630550. Its totient is φ = 196630548.

The previous prime is 196630541. The next prime is 196630561. The reversal of 196630549 is 945036691.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 195496324 + 1134225 = 13982^2 + 1065^2 .

It is an emirp because it is prime and its reverse (945036691) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 196630549 - 2³ = 196630541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (196630541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98315274 + 98315275.

It is an arithmetic number, because the mean of its divisors is an integer number (98315275).

Almost surely, 2^196630549 is an apocalyptic number.

It is an amenable number.

196630549 is a deficient number, since it is larger than the sum of its proper divisors (1).

196630549 is an equidigital number, since it uses as much as digits as its factorization.

196630549 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 174960, while the sum is 43.

The square root of 196630549 is about 14022.5015243358. The cubic root of 196630549 is about 581.5008188110.

The spelling of 196630549 in words is "one hundred ninety-six million, six hundred thirty thousand, five hundred forty-nine".