195139904 has 28 divisors (see below), whose sum is σ = 393801600. Its totient is φ = 95914368.

The previous prime is 195139897. The next prime is 195139907. The reversal of 195139904 is 409931591.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195139907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22064 + ... + 29615.

Almost surely, 2^195139904 is an apocalyptic number.

It is an amenable number.

195139904 is an abundant number, since it is smaller than the sum of its proper divisors (198661696).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

195139904 is an equidigital number, since it uses as much as digits as its factorization.

195139904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51750 (or 51740 counting only the distinct ones).

The product of its (nonzero) digits is 43740, while the sum is 41.

The square root of 195139904 is about 13969.2485123574. The cubic root of 195139904 is about 580.0276483055.

The spelling of 195139904 in words is "one hundred ninety-five million, one hundred thirty-nine thousand, nine hundred four".