196692591 has 4 divisors (see below), whose sum is σ = 262256792. Its totient is φ = 131128392.

The previous prime is 196692577. The next prime is 196692631. The reversal of 196692591 is 195296691.

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

It is not a de Polignac number, because 196692591 - 2²¹ = 194595439 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 196692591.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (196692521) 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 3 ways as a sum of consecutive naturals, for example, 32782096 + ... + 32782101.

It is an arithmetic number, because the mean of its divisors is an integer number (65564198).

Almost surely, 2^196692591 is an apocalyptic number.

196692591 is a deficient number, since it is larger than the sum of its proper divisors (65564201).

196692591 is an equidigital number, since it uses as much as digits as its factorization.

196692591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65564200.

The product of its digits is 262440, while the sum is 48.

The square root of 196692591 is about 14024.7135799631. The cubic root of 196692591 is about 581.5619718723.

The spelling of 196692591 in words is "one hundred ninety-six million, six hundred ninety-two thousand, five hundred ninety-one".