195944005 has 4 divisors (see below), whose sum is σ = 235132812. Its totient is φ = 156755200.

The previous prime is 195943997. The next prime is 195944011. The reversal of 195944005 is 500449591.

It is a Cunningham number, because it is equal to 13998²+1.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 500449591 = 1553 ⋅322247.

It can be written as a sum of positive squares in 2 ways, for example, as 70526404 + 125417601 = 8398^2 + 11199^2 .

It is not a de Polignac number, because 195944005 - 2³ = 195943997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19594396 + ... + 19594405.

It is an arithmetic number, because the mean of its divisors is an integer number (58783203).

Almost surely, 2^195944005 is an apocalyptic number.

It is an amenable number.

195944005 is a deficient number, since it is larger than the sum of its proper divisors (39188807).

195944005 is an equidigital number, since it uses as much as digits as its factorization.

195944005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39188806.

The product of its (nonzero) digits is 32400, while the sum is 37.

The square root of 195944005 is about 13998.0000357194. Note that the first 4 decimals coincide. The cubic root of 195944005 is about 580.8232512583.

The spelling of 195944005 in words is "one hundred ninety-five million, nine hundred forty-four thousand, five".