195939761 has 4 divisors (see below), whose sum is σ = 206252400. Its totient is φ = 185627124.

The previous prime is 195939749. The next prime is 195939763. The reversal of 195939761 is 167939591.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 195939761 - 2¹⁰ = 195938737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (195939763) 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 3 ways as a sum of consecutive naturals, for example, 5156291 + ... + 5156328.

It is an arithmetic number, because the mean of its divisors is an integer number (51563100).

Almost surely, 2^195939761 is an apocalyptic number.

It is an amenable number.

195939761 is a deficient number, since it is larger than the sum of its proper divisors (10312639).

195939761 is a wasteful number, since it uses less digits than its factorization.

195939761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10312638.

The product of its digits is 459270, while the sum is 50.

The square root of 195939761 is about 13997.8484418142. The cubic root of 195939761 is about 580.8190578295.

The spelling of 195939761 in words is "one hundred ninety-five million, nine hundred thirty-nine thousand, seven hundred sixty-one".