195983743 has 2 divisors, whose sum is σ = 195983744. Its totient is φ = 195983742.

The previous prime is 195983741. The next prime is 195983761. The reversal of 195983743 is 347389591.

It is a weak prime.

It is an emirp because it is prime and its reverse (347389591) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 195983743 - 2¹ = 195983741 is a prime.

Together with 195983741, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (195983741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97991871 + 97991872.

It is an arithmetic number, because the mean of its divisors is an integer number (97991872).

Almost surely, 2^195983743 is an apocalyptic number.

195983743 is a deficient number, since it is larger than the sum of its proper divisors (1).

195983743 is an equidigital number, since it uses as much as digits as its factorization.

195983743 is an evil number, because the sum of its binary digits is even.

The product of its digits is 816480, while the sum is 49.

The square root of 195983743 is about 13999.4193808172. The cubic root of 195983743 is about 580.8625128052.

The spelling of 195983743 in words is "one hundred ninety-five million, nine hundred eighty-three thousand, seven hundred forty-three".