195779061 has 12 divisors (see below), whose sum is σ = 282968140. Its totient is φ = 130438080.

The previous prime is 195779057. The next prime is 195779081. The reversal of 195779061 is 160977591.

195779061 is a `hidden beast` number, since 19 + 577 + 9 + 0 + 61 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 92044836 + 103734225 = 9594^2 + 10185^2 .

It is not a de Polignac number, because 195779061 - 2² = 195779057 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 195778998 and 195779016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195779081) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10905 + ... + 22593.

Almost surely, 2^195779061 is an apocalyptic number.

It is an amenable number.

195779061 is a deficient number, since it is larger than the sum of its proper divisors (87189079).

195779061 is a wasteful number, since it uses less digits than its factorization.

195779061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13556 (or 13553 counting only the distinct ones).

The product of its (nonzero) digits is 119070, while the sum is 45.

The square root of 195779061 is about 13992.1070965027. The cubic root of 195779061 is about 580.6602281452.

It can be divided in two parts, 1957 and 79061, that added together give a palindrome (81018).

The spelling of 195779061 in words is "one hundred ninety-five million, seven hundred seventy-nine thousand, sixty-one".