196297591 has 8 divisors (see below), whose sum is σ = 224944544. Its totient is φ = 167801760.

The previous prime is 196297561. The next prime is 196297609. The reversal of 196297591 is 195792691.

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

It is not a de Polignac number, because 196297591 - 2⁵ = 196297559 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 (196297501) 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 7 ways as a sum of consecutive naturals, for example, 34980 + ... + 40201.

It is an arithmetic number, because the mean of its divisors is an integer number (28118068).

Almost surely, 2^196297591 is an apocalyptic number.

196297591 is a deficient number, since it is larger than the sum of its proper divisors (28646953).

196297591 is an equidigital number, since it uses as much as digits as its factorization.

196297591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75561.

The product of its digits is 306180, while the sum is 49.

The square root of 196297591 is about 14010.6242187848. The cubic root of 196297591 is about 581.1724114880.

The spelling of 196297591 in words is "one hundred ninety-six million, two hundred ninety-seven thousand, five hundred ninety-one".