195339905 has 8 divisors (see below), whose sum is σ = 234484200. Its totient is φ = 156221056.

The previous prime is 195339889. The next prime is 195339913. The reversal of 195339905 is 509933591.

It can be written as a sum of positive squares in 4 ways, for example, as 28206721 + 167133184 = 5311^2 + 12928^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 195339905 - 2⁴ = 195339889 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22181 + ... + 29709.

It is an arithmetic number, because the mean of its divisors is an integer number (29310525).

Almost surely, 2^195339905 is an apocalyptic number.

It is an amenable number.

195339905 is a deficient number, since it is larger than the sum of its proper divisors (39144295).

195339905 is an equidigital number, since it uses as much as digits as its factorization.

195339905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12723.

The product of its (nonzero) digits is 164025, while the sum is 44.

The square root of 195339905 is about 13976.4052960695. The cubic root of 195339905 is about 580.2257395174.

The spelling of 195339905 in words is "one hundred ninety-five million, three hundred thirty-nine thousand, nine hundred five".