195955213 has 2 divisors, whose sum is σ = 195955214. Its totient is φ = 195955212.

The previous prime is 195955187. The next prime is 195955223. The reversal of 195955213 is 312559591.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 195916009 + 39204 = 13997^2 + 198^2 .

It is an emirp because it is prime and its reverse (312559591) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 195955213 - 2¹³ = 195947021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (195955223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97977606 + 97977607.

It is an arithmetic number, because the mean of its divisors is an integer number (97977607).

Almost surely, 2^195955213 is an apocalyptic number.

It is an amenable number.

195955213 is a deficient number, since it is larger than the sum of its proper divisors (1).

195955213 is an equidigital number, since it uses as much as digits as its factorization.

195955213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60750, while the sum is 40.

The square root of 195955213 is about 13998.4003728998. The cubic root of 195955213 is about 580.8343254133.

The spelling of 195955213 in words is "one hundred ninety-five million, nine hundred fifty-five thousand, two hundred thirteen".