196917823 has 2 divisors, whose sum is σ = 196917824. Its totient is φ = 196917822.

The previous prime is 196917803. The next prime is 196917839. The reversal of 196917823 is 328719691.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-196917823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (196917803) 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 as a sum of consecutive naturals, namely, 98458911 + 98458912.

It is an arithmetic number, because the mean of its divisors is an integer number (98458912).

Almost surely, 2^196917823 is an apocalyptic number.

196917823 is a deficient number, since it is larger than the sum of its proper divisors (1).

196917823 is an equidigital number, since it uses as much as digits as its factorization.

196917823 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 163296, while the sum is 46.

The square root of 196917823 is about 14032.7411078520. The cubic root of 196917823 is about 581.7838687247.

The spelling of 196917823 in words is "one hundred ninety-six million, nine hundred seventeen thousand, eight hundred twenty-three".