195764213 has 2 divisors, whose sum is σ = 195764214. Its totient is φ = 195764212.

The previous prime is 195764209. The next prime is 195764227. The reversal of 195764213 is 312467591.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 193710724 + 2053489 = 13918^2 + 1433^2 .

It is a cyclic number.

It is not a de Polignac number, because 195764213 - 2² = 195764209 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (195764813) 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, 97882106 + 97882107.

It is an arithmetic number, because the mean of its divisors is an integer number (97882107).

Almost surely, 2^195764213 is an apocalyptic number.

It is an amenable number.

195764213 is a deficient number, since it is larger than the sum of its proper divisors (1).

195764213 is an equidigital number, since it uses as much as digits as its factorization.

195764213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45360, while the sum is 38.

The square root of 195764213 is about 13991.5765015955. The cubic root of 195764213 is about 580.6455485688.

The spelling of 195764213 in words is "one hundred ninety-five million, seven hundred sixty-four thousand, two hundred thirteen".