196889171 has 2 divisors, whose sum is σ = 196889172. Its totient is φ = 196889170.

The previous prime is 196889129. The next prime is 196889179. The reversal of 196889171 is 171988691.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-196889171 is a prime.

It is not a weakly prime, because it can be changed into another prime (196889179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98444585 + 98444586.

It is an arithmetic number, because the mean of its divisors is an integer number (98444586).

Almost surely, 2^196889171 is an apocalyptic number.

196889171 is a deficient number, since it is larger than the sum of its proper divisors (1).

196889171 is an equidigital number, since it uses as much as digits as its factorization.

196889171 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 217728, while the sum is 50.

The square root of 196889171 is about 14031.7201725234. The cubic root of 196889171 is about 581.7556503886.

The spelling of 196889171 in words is "one hundred ninety-six million, eight hundred eighty-nine thousand, one hundred seventy-one".