196565819 has 8 divisors (see below), whose sum is σ = 199119648. Its totient is φ = 194028480.

The previous prime is 196565813. The next prime is 196565821. The reversal of 196565819 is 918565691.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-196565819 is a prime.

It is a super-2 number, since 2×196565819² = 77276242398281522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (196565813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20834 + ... + 28760.

It is an arithmetic number, because the mean of its divisors is an integer number (24889956).

Almost surely, 2^196565819 is an apocalyptic number.

196565819 is a deficient number, since it is larger than the sum of its proper divisors (2553829).

196565819 is a wasteful number, since it uses less digits than its factorization.

196565819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8245.

The product of its digits is 583200, while the sum is 50.

The square root of 196565819 is about 14020.1932582971. The cubic root of 196565819 is about 581.4370025503.

The spelling of 196565819 in words is "one hundred ninety-six million, five hundred sixty-five thousand, eight hundred nineteen".