196409197 has 4 divisors (see below), whose sum is σ = 197406396. Its totient is φ = 195412000.

The previous prime is 196409179. The next prime is 196409207. The reversal of 196409197 is 791904691.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 158105476 + 38303721 = 12574^2 + 6189^2 .

It is a cyclic number.

It is not a de Polignac number, because 196409197 - 2²³ = 188020589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (196409117) 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 3 ways as a sum of consecutive naturals, for example, 498304 + ... + 498697.

It is an arithmetic number, because the mean of its divisors is an integer number (49351599).

Almost surely, 2^196409197 is an apocalyptic number.

It is an amenable number.

196409197 is a deficient number, since it is larger than the sum of its proper divisors (997199).

196409197 is an equidigital number, since it uses as much as digits as its factorization.

196409197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 997198.

The product of its (nonzero) digits is 122472, while the sum is 46.

The square root of 196409197 is about 14014.6065588728. The cubic root of 196409197 is about 581.2825334702.

The spelling of 196409197 in words is "one hundred ninety-six million, four hundred nine thousand, one hundred ninety-seven".