196455791 has 8 divisors (see below), whose sum is σ = 237728160. Its totient is φ = 158485248.

The previous prime is 196455769. The next prime is 196455797. The reversal of 196455791 is 197554691.

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

It is a cyclic number.

It is not a de Polignac number, because 196455791 - 2¹⁰ = 196454767 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 (196455797) 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, 825326 + ... + 825563.

It is an arithmetic number, because the mean of its divisors is an integer number (29716020).

Almost surely, 2^196455791 is an apocalyptic number.

196455791 is a deficient number, since it is larger than the sum of its proper divisors (41272369).

196455791 is a wasteful number, since it uses less digits than its factorization.

196455791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1650913.

The product of its digits is 340200, while the sum is 47.

The square root of 196455791 is about 14016.2687973654. The cubic root of 196455791 is about 581.3284955693.

The spelling of 196455791 in words is "one hundred ninety-six million, four hundred fifty-five thousand, seven hundred ninety-one".