196818709 has 4 divisors (see below), whose sum is σ = 196915104. Its totient is φ = 196722316.

The previous prime is 196818649. The next prime is 196818773. The reversal of 196818709 is 907818691.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 196818709 - 2¹⁹ = 196294421 is a prime.

It is a super-3 number, since 3×196818709³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (196818109) 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 3 ways as a sum of consecutive naturals, for example, 45067 + ... + 49240.

It is an arithmetic number, because the mean of its divisors is an integer number (49228776).

Almost surely, 2^196818709 is an apocalyptic number.

It is an amenable number.

196818709 is a deficient number, since it is larger than the sum of its proper divisors (96395).

196818709 is an equidigital number, since it uses as much as digits as its factorization.

196818709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96394.

The product of its (nonzero) digits is 217728, while the sum is 49.

The square root of 196818709 is about 14029.2091366549. The cubic root of 196818709 is about 581.6862432234.

The spelling of 196818709 in words is "one hundred ninety-six million, eight hundred eighteen thousand, seven hundred nine".