195538943 has 4 divisors (see below), whose sum is σ = 195571488. Its totient is φ = 195506400.

The previous prime is 195538927. The next prime is 195538949. The reversal of 195538943 is 349835591.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 349835591 = 7 ⋅49976513.

It is a cyclic number.

It is not a de Polignac number, because 195538943 - 2⁴ = 195538927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195538949) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4346 + ... + 20247.

It is an arithmetic number, because the mean of its divisors is an integer number (48892872).

Almost surely, 2^195538943 is an apocalyptic number.

195538943 is a deficient number, since it is larger than the sum of its proper divisors (32545).

195538943 is an equidigital number, since it uses as much as digits as its factorization.

195538943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32544.

The product of its digits is 583200, while the sum is 47.

The square root of 195538943 is about 13983.5239836030. The cubic root of 195538943 is about 580.4227427334.

The spelling of 195538943 in words is "one hundred ninety-five million, five hundred thirty-eight thousand, nine hundred forty-three".