195904049 has 4 divisors (see below), whose sum is σ = 213713520. Its totient is φ = 178094580.

The previous prime is 195904031. The next prime is 195904063. The reversal of 195904049 is 940409591.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 195904049 - 2⁸ = 195903793 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 195903997 and 195904015.

It is not an unprimeable number, because it can be changed into a prime (195904069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8904719 + ... + 8904740.

It is an arithmetic number, because the mean of its divisors is an integer number (53428380).

Almost surely, 2^195904049 is an apocalyptic number.

It is an amenable number.

195904049 is a deficient number, since it is larger than the sum of its proper divisors (17809471).

195904049 is a wasteful number, since it uses less digits than its factorization.

195904049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17809470.

The product of its (nonzero) digits is 58320, while the sum is 41.

The square root of 195904049 is about 13996.5727590721. The cubic root of 195904049 is about 580.7837689728.

The spelling of 195904049 in words is "one hundred ninety-five million, nine hundred four thousand, forty-nine".