196304209 has 4 divisors (see below), whose sum is σ = 200008116. Its totient is φ = 192600304.

The previous prime is 196304197. The next prime is 196304221. The reversal of 196304209 is 902403691.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 902403691 = 7 ⋅128914813.

It is an interprime number because it is at equal distance from previous prime (196304197) and next prime (196304221).

It can be written as a sum of positive squares in 2 ways, for example, as 58476609 + 137827600 = 7647^2 + 11740^2 .

It is not a de Polignac number, because 196304209 - 2¹⁷ = 196173137 is a prime.

It is a super-2 number, since 2×196304209² = 77070684942231362, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (196304239) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1851874 + ... + 1851979.

It is an arithmetic number, because the mean of its divisors is an integer number (50002029).

Almost surely, 2^196304209 is an apocalyptic number.

It is an amenable number.

196304209 is a deficient number, since it is larger than the sum of its proper divisors (3703907).

196304209 is an equidigital number, since it uses as much as digits as its factorization.

196304209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3703906.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 196304209 is about 14010.8603947081. The cubic root of 196304209 is about 581.1789426529.

The spelling of 196304209 in words is "one hundred ninety-six million, three hundred four thousand, two hundred nine".