195930653 has 2 divisors, whose sum is σ = 195930654. Its totient is φ = 195930652.

The previous prime is 195930649. The next prime is 195930667. The reversal of 195930653 is 356039591.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 170093764 + 25836889 = 13042^2 + 5083^2 .

It is a cyclic number.

It is not a de Polignac number, because 195930653 - 2² = 195930649 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 195930653.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (195930673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97965326 + 97965327.

It is an arithmetic number, because the mean of its divisors is an integer number (97965327).

Almost surely, 2^195930653 is an apocalyptic number.

It is an amenable number.

195930653 is a deficient number, since it is larger than the sum of its proper divisors (1).

195930653 is an equidigital number, since it uses as much as digits as its factorization.

195930653 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 109350, while the sum is 41.

The square root of 195930653 is about 13997.5231023206. The cubic root of 195930653 is about 580.8100581555.

The spelling of 195930653 in words is "one hundred ninety-five million, nine hundred thirty thousand, six hundred fifty-three".