195447889 has 16 divisors (see below), whose sum is σ = 253214080. Its totient is φ = 146499840.

The previous prime is 195447881. The next prime is 195447953. The reversal of 195447889 is 988744591.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 195447889 - 2³ = 195447881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (195447881) 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 15 ways as a sum of consecutive naturals, for example, 54792 + ... + 58249.

It is an arithmetic number, because the mean of its divisors is an integer number (15825880).

Almost surely, 2^195447889 is an apocalyptic number.

195447889 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

195447889 is a deficient number, since it is larger than the sum of its proper divisors (57766191).

195447889 is a wasteful number, since it uses less digits than its factorization.

195447889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113080.

The product of its digits is 2903040, while the sum is 55.

The square root of 195447889 is about 13980.2678443583. The cubic root of 195447889 is about 580.3326361848.

The spelling of 195447889 in words is "one hundred ninety-five million, four hundred forty-seven thousand, eight hundred eighty-nine".