196390209 has 4 divisors (see below), whose sum is σ = 261853616. Its totient is φ = 130926804.

The previous prime is 196390153. The next prime is 196390217. The reversal of 196390209 is 902093691.

It is a happy number.

196390209 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 not a de Polignac number, because 196390209 - 2⁷ = 196390081 is a prime.

It is a super-2 number, since 2×196390209² = 77138228382127362, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (196390219) 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, 32731699 + ... + 32731704.

It is an arithmetic number, because the mean of its divisors is an integer number (65463404).

Almost surely, 2^196390209 is an apocalyptic number.

It is an amenable number.

196390209 is a deficient number, since it is larger than the sum of its proper divisors (65463407).

196390209 is an equidigital number, since it uses as much as digits as its factorization.

196390209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65463406.

The product of its (nonzero) digits is 26244, while the sum is 39.

The square root of 196390209 is about 14013.9291064284. The cubic root of 196390209 is about 581.2638008979.

The spelling of 196390209 in words is "one hundred ninety-six million, three hundred ninety thousand, two hundred nine".