195942791 has 8 divisors (see below), whose sum is σ = 215648784. Its totient is φ = 176552320.

The previous prime is 195942781. The next prime is 195942793. The reversal of 195942791 is 197249591.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-195942791 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 (195942793) 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 7 ways as a sum of consecutive naturals, for example, 77576 + ... + 80061.

It is an arithmetic number, because the mean of its divisors is an integer number (26956098).

Almost surely, 2^195942791 is an apocalyptic number.

195942791 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

195942791 is a deficient number, since it is larger than the sum of its proper divisors (19705993).

195942791 is a wasteful number, since it uses less digits than its factorization.

195942791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157761.

The product of its digits is 204120, while the sum is 47.

The square root of 195942791 is about 13997.9566723147. The cubic root of 195942791 is about 580.8220517304.

The spelling of 195942791 in words is "one hundred ninety-five million, nine hundred forty-two thousand, seven hundred ninety-one".