196688911 has 2 divisors, whose sum is σ = 196688912. Its totient is φ = 196688910.

The previous prime is 196688909. The next prime is 196688941. The reversal of 196688911 is 119886691.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (119886691) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 196688911 - 2¹ = 196688909 is a prime.

Together with 196688909, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (196688941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98344455 + 98344456.

It is an arithmetic number, because the mean of its divisors is an integer number (98344456).

Almost surely, 2^196688911 is an apocalyptic number.

196688911 is a deficient number, since it is larger than the sum of its proper divisors (1).

196688911 is an equidigital number, since it uses as much as digits as its factorization.

196688911 is an evil number, because the sum of its binary digits is even.

The product of its digits is 186624, while the sum is 49.

The square root of 196688911 is about 14024.5823823742. The cubic root of 196688911 is about 581.5583449582.

The spelling of 196688911 in words is "one hundred ninety-six million, six hundred eighty-eight thousand, nine hundred eleven".