195650681 has 4 divisors (see below), whose sum is σ = 195682164. Its totient is φ = 195619200.

The previous prime is 195650629. The next prime is 195650713. The reversal of 195650681 is 186056591.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 115369081 + 80281600 = 10741^2 + 8960^2 .

It is a cyclic number.

It is not a de Polignac number, because 195650681 - 2²⁶ = 128541817 is a prime.

It is a super-2 number, since 2×195650681² = 76558377951527522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (195650621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2960 + ... + 20001.

It is an arithmetic number, because the mean of its divisors is an integer number (48920541).

Almost surely, 2^195650681 is an apocalyptic number.

It is an amenable number.

195650681 is a deficient number, since it is larger than the sum of its proper divisors (31483).

195650681 is an equidigital number, since it uses as much as digits as its factorization.

195650681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31482.

The product of its (nonzero) digits is 64800, while the sum is 41.

The square root of 195650681 is about 13987.5187578069. The cubic root of 195650681 is about 580.5332798398.

The spelling of 195650681 in words is "one hundred ninety-five million, six hundred fifty thousand, six hundred eighty-one".