196986261 has 16 divisors (see below), whose sum is σ = 270468800. Its totient is φ = 127433088.

The previous prime is 196986247. The next prime is 196986289. The reversal of 196986261 is 162689691.

It is not a de Polignac number, because 196986261 - 2⁶ = 196986197 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 196986261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (196986761) 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 in 15 ways as a sum of consecutive naturals, for example, 43230 + ... + 47568.

It is an arithmetic number, because the mean of its divisors is an integer number (16904300).

Almost surely, 2^196986261 is an apocalyptic number.

It is an amenable number.

196986261 is a deficient number, since it is larger than the sum of its proper divisors (73482539).

196986261 is a wasteful number, since it uses less digits than its factorization.

196986261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4788.

The product of its digits is 279936, while the sum is 48.

The square root of 196986261 is about 14035.1794074746. The cubic root of 196986261 is about 581.8512598019.

The spelling of 196986261 in words is "one hundred ninety-six million, nine hundred eighty-six thousand, two hundred sixty-one".