195641893 has 2 divisors, whose sum is σ = 195641894. Its totient is φ = 195641892.

The previous prime is 195641867. The next prime is 195641923. The reversal of 195641893 is 398146591.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 190633249 + 5008644 = 13807^2 + 2238^2 .

It is an emirp because it is prime and its reverse (398146591) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 195641893 - 2¹³ = 195633701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (195641833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97820946 + 97820947.

It is an arithmetic number, because the mean of its divisors is an integer number (97820947).

Almost surely, 2^195641893 is an apocalyptic number.

It is an amenable number.

195641893 is a deficient number, since it is larger than the sum of its proper divisors (1).

195641893 is an equidigital number, since it uses as much as digits as its factorization.

195641893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 233280, while the sum is 46.

The square root of 195641893 is about 13987.2046170777. The cubic root of 195641893 is about 580.5245878130.

The spelling of 195641893 in words is "one hundred ninety-five million, six hundred forty-one thousand, eight hundred ninety-three".