195308642 has 4 divisors (see below), whose sum is σ = 292962966. Its totient is φ = 97654320.

The previous prime is 195308629. The next prime is 195308647. The reversal of 195308642 is 246803591.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 161772961 + 33535681 = 12719^2 + 5791^2 .

It is a junction number, because it is equal to n+sod(n) for n = 195308596 and 195308605.

It is not an unprimeable number, because it can be changed into a prime (195308647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48827159 + ... + 48827162.

Almost surely, 2^195308642 is an apocalyptic number.

195308642 is a deficient number, since it is larger than the sum of its proper divisors (97654324).

195308642 is an equidigital number, since it uses as much as digits as its factorization.

195308642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97654323.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 195308642 is about 13975.2868306879. The cubic root of 195308642 is about 580.1947839632.

The spelling of 195308642 in words is "one hundred ninety-five million, three hundred eight thousand, six hundred forty-two".