195777797 has 8 divisors (see below), whose sum is σ = 208878912. Its totient is φ = 182852800.

The previous prime is 195777781. The next prime is 195777821. The reversal of 195777797 is 797777591.

195777797 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 195777797 - 2⁴ = 195777781 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 (195777737) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41729 + ... + 46182.

It is an arithmetic number, because the mean of its divisors is an integer number (26109864).

Almost surely, 2^195777797 is an apocalyptic number.

195777797 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

195777797 is a deficient number, since it is larger than the sum of its proper divisors (13101115).

195777797 is a wasteful number, since it uses less digits than its factorization.

195777797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88059.

The product of its digits is 6806835, while the sum is 59.

The square root of 195777797 is about 13992.0619281077. The cubic root of 195777797 is about 580.6589785119.

The spelling of 195777797 in words is "one hundred ninety-five million, seven hundred seventy-seven thousand, seven hundred ninety-seven".