195904 has 14 divisors (see below), whose sum is σ = 388874. Its totient is φ = 97920.

The previous prime is 195893. The next prime is 195907. The reversal of 195904 is 409591.

195904 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 193600 + 2304 = 440^2 + 48^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195907) by changing a digit.

195904 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1467 + ... + 1594.

2¹⁹⁵⁹⁰⁴ is an apocalyptic number.

It is an amenable number.

195904 is a deficient number, since it is larger than the sum of its proper divisors (192970).

195904 is an equidigital number, since it uses as much as digits as its factorization.

195904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3073 (or 3063 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 195904 is about 442.6104381959. The cubic root of 195904 is about 58.0783720550.

The spelling of 195904 in words is "one hundred ninety-five thousand, nine hundred four".