195979163 has 2 divisors, whose sum is σ = 195979164. Its totient is φ = 195979162.

The previous prime is 195979151. The next prime is 195979181. The reversal of 195979163 is 361979591.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 195979163 - 2¹⁴ = 195962779 is a prime.

It is not a weakly prime, because it can be changed into another prime (195979123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97989581 + 97989582.

It is an arithmetic number, because the mean of its divisors is an integer number (97989582).

Almost surely, 2^195979163 is an apocalyptic number.

195979163 is a deficient number, since it is larger than the sum of its proper divisors (1).

195979163 is an equidigital number, since it uses as much as digits as its factorization.

195979163 is an evil number, because the sum of its binary digits is even.

The product of its digits is 459270, while the sum is 50.

The square root of 195979163 is about 13999.2558016489. The cubic root of 195979163 is about 580.8579879894.

The spelling of 195979163 in words is "one hundred ninety-five million, nine hundred seventy-nine thousand, one hundred sixty-three".