196646691 has 4 divisors (see below), whose sum is σ = 262195592. Its totient is φ = 131097792.

The previous prime is 196646689. The next prime is 196646699.

196646691 is nontrivially palindromic in base 10.

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

It is not a de Polignac number, because 196646691 - 2¹ = 196646689 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 196646691.

It is not an unprimeable number, because it can be changed into a prime (196646699) 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, 32774446 + ... + 32774451.

It is an arithmetic number, because the mean of its divisors is an integer number (65548898).

Almost surely, 2^196646691 is an apocalyptic number.

196646691 is a deficient number, since it is larger than the sum of its proper divisors (65548901).

196646691 is an equidigital number, since it uses as much as digits as its factorization.

196646691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65548900.

The product of its digits is 419904, while the sum is 48.

The square root of 196646691 is about 14023.0770874298. The cubic root of 196646691 is about 581.5167307661.

The spelling of 196646691 in words is "one hundred ninety-six million, six hundred forty-six thousand, six hundred ninety-one".