195673691 has 2 divisors, whose sum is σ = 195673692. Its totient is φ = 195673690.

The previous prime is 195673679. The next prime is 195673697. The reversal of 195673691 is 196376591.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (196376591) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 195673691 - 2¹⁸ = 195411547 is a prime.

It is not a weakly prime, because it can be changed into another prime (195673697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97836845 + 97836846.

It is an arithmetic number, because the mean of its divisors is an integer number (97836846).

Almost surely, 2^195673691 is an apocalyptic number.

195673691 is a deficient number, since it is larger than the sum of its proper divisors (1).

195673691 is an equidigital number, since it uses as much as digits as its factorization.

195673691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 306180, while the sum is 47.

The square root of 195673691 is about 13988.3412526289. The cubic root of 195673691 is about 580.5560373159.

The spelling of 195673691 in words is "one hundred ninety-five million, six hundred seventy-three thousand, six hundred ninety-one".