196817309 has 8 divisors (see below), whose sum is σ = 212446080. Its totient is φ = 181258416.

The previous prime is 196817297. The next prime is 196817339. The reversal of 196817309 is 903718691.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 196817309 - 2⁸ = 196817053 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 196817309.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (196817339) 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 7 ways as a sum of consecutive naturals, for example, 11537 + ... + 22950.

It is an arithmetic number, because the mean of its divisors is an integer number (26555760).

Almost surely, 2^196817309 is an apocalyptic number.

It is an amenable number.

196817309 is a deficient number, since it is larger than the sum of its proper divisors (15628771).

196817309 is a wasteful number, since it uses less digits than its factorization.

196817309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34939.

The product of its (nonzero) digits is 81648, while the sum is 44.

The square root of 196817309 is about 14029.1592406673. The cubic root of 196817309 is about 581.6848640140.

The spelling of 196817309 in words is "one hundred ninety-six million, eight hundred seventeen thousand, three hundred nine".