195779113 has 2 divisors, whose sum is σ = 195779114. Its totient is φ = 195779112.

The previous prime is 195779081. The next prime is 195779149. The reversal of 195779113 is 311977591.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 191767104 + 4012009 = 13848^2 + 2003^2 .

It is a cyclic number.

It is not a de Polignac number, because 195779113 - 2⁵ = 195779081 is a prime.

It is a super-2 number, since 2×195779113² = 76658922174133538, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 195779113.

It is not a weakly prime, because it can be changed into another prime (195779153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97889556 + 97889557.

It is an arithmetic number, because the mean of its divisors is an integer number (97889557).

Almost surely, 2^195779113 is an apocalyptic number.

It is an amenable number.

195779113 is a deficient number, since it is larger than the sum of its proper divisors (1).

195779113 is an equidigital number, since it uses as much as digits as its factorization.

195779113 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 59535, while the sum is 43.

The square root of 195779113 is about 13992.1089546930. The cubic root of 195779113 is about 580.6602795540.

The spelling of 195779113 in words is "one hundred ninety-five million, seven hundred seventy-nine thousand, one hundred thirteen".