195774947 has 2 divisors, whose sum is σ = 195774948. Its totient is φ = 195774946.

The previous prime is 195774937. The next prime is 195774961. The reversal of 195774947 is 749477591.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 195774947 - 2¹⁸ = 195512803 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (195774937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97887473 + 97887474.

It is an arithmetic number, because the mean of its divisors is an integer number (97887474).

Almost surely, 2^195774947 is an apocalyptic number.

195774947 is a deficient number, since it is larger than the sum of its proper divisors (1).

195774947 is an equidigital number, since it uses as much as digits as its factorization.

195774947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2222640, while the sum is 53.

The square root of 195774947 is about 13991.9600842770. The cubic root of 195774947 is about 580.6561608854.

The spelling of 195774947 in words is "one hundred ninety-five million, seven hundred seventy-four thousand, nine hundred forty-seven".