195064643 has 4 divisors (see below), whose sum is σ = 201791040. Its totient is φ = 188338248.

The previous prime is 195064637. The next prime is 195064651. The reversal of 195064643 is 346460591.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 195064643 - 2¹⁰ = 195063619 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 195064597 and 195064606.

It is not an unprimeable number, because it can be changed into a prime (195064663) 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, 3363155 + ... + 3363212.

It is an arithmetic number, because the mean of its divisors is an integer number (50447760).

Almost surely, 2^195064643 is an apocalyptic number.

195064643 is a deficient number, since it is larger than the sum of its proper divisors (6726397).

195064643 is an equidigital number, since it uses as much as digits as its factorization.

195064643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6726396.

The product of its (nonzero) digits is 77760, while the sum is 38.

The square root of 195064643 is about 13966.5544426677. The cubic root of 195064643 is about 579.9530709156.

The spelling of 195064643 in words is "one hundred ninety-five million, sixty-four thousand, six hundred forty-three".