195897447 has 20 divisors (see below), whose sum is σ = 293727016. Its totient is φ = 130111920.

The previous prime is 195897439. The next prime is 195897473. The reversal of 195897447 is 744798591.

195897447 is a `hidden beast` number, since 19 + 589 + 7 + 4 + 47 = 666.

It is not a de Polignac number, because 195897447 - 2³ = 195897439 is a prime.

It is a super-2 number, since 2×195897447² = 76751619482235618, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 195897393 and 195897402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195897547) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 18072 + ... + 26802.

Almost surely, 2^195897447 is an apocalyptic number.

195897447 is a deficient number, since it is larger than the sum of its proper divisors (97829569).

195897447 is an equidigital number, since it uses as much as digits as its factorization.

195897447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9020 (or 9011 counting only the distinct ones).

The product of its digits is 2540160, while the sum is 54.

The square root of 195897447 is about 13996.3369136357. The cubic root of 195897447 is about 580.7772447287. Note that the first 3 decimals are identical.

The spelling of 195897447 in words is "one hundred ninety-five million, eight hundred ninety-seven thousand, four hundred forty-seven".