195091443 has 16 divisors (see below), whose sum is σ = 290109600. Its totient is φ = 129572640.

The previous prime is 195091433. The next prime is 195091447. The reversal of 195091443 is 344190591.

It is a happy number.

195091443 is a `hidden beast` number, since 1 + 9 + 509 + 144 + 3 = 666.

It is not a de Polignac number, because 195091443 - 2¹⁶ = 195025907 is a prime.

It is a super-2 number, since 2×195091443² = 76121342263644498, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 195091398 and 195091407.

It is not an unprimeable number, because it can be changed into a prime (195091447) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 6168 + ... + 20693.

It is an arithmetic number, because the mean of its divisors is an integer number (18131850).

Almost surely, 2^195091443 is an apocalyptic number.

195091443 is a deficient number, since it is larger than the sum of its proper divisors (95018157).

195091443 is a wasteful number, since it uses less digits than its factorization.

195091443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27139 (or 27133 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 195091443 is about 13967.5138446325. The cubic root of 195091443 is about 579.9796296849.

The spelling of 195091443 in words is "one hundred ninety-five million, ninety-one thousand, four hundred forty-three".