195195899 has 2 divisors, whose sum is σ = 195195900. Its totient is φ = 195195898.

The previous prime is 195195863. The next prime is 195195907. The reversal of 195195899 is 998591591.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (998591591) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 195195899 - 2¹⁶ = 195130363 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (195195829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97597949 + 97597950.

It is an arithmetic number, because the mean of its divisors is an integer number (97597950).

Almost surely, 2^195195899 is an apocalyptic number.

195195899 is a deficient number, since it is larger than the sum of its proper divisors (1).

195195899 is an equidigital number, since it uses as much as digits as its factorization.

195195899 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1312200, while the sum is 56.

The square root of 195195899 is about 13971.2525923770. The cubic root of 195195899 is about 580.0831222525.

The spelling of 195195899 in words is "one hundred ninety-five million, one hundred ninety-five thousand, eight hundred ninety-nine".