195826649 has 2 divisors, whose sum is σ = 195826650. Its totient is φ = 195826648.

The previous prime is 195826633. The next prime is 195826651. The reversal of 195826649 is 946628591.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 172449424 + 23377225 = 13132^2 + 4835^2 .

It is a cyclic number.

It is not a de Polignac number, because 195826649 - 2⁴ = 195826633 is a prime.

Together with 195826651, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 195826597 and 195826606.

It is not a weakly prime, because it can be changed into another prime (195826699) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97913324 + 97913325.

It is an arithmetic number, because the mean of its divisors is an integer number (97913325).

Almost surely, 2^195826649 is an apocalyptic number.

It is an amenable number.

195826649 is a deficient number, since it is larger than the sum of its proper divisors (1).

195826649 is an equidigital number, since it uses as much as digits as its factorization.

195826649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 933120, while the sum is 50.

The square root of 195826649 is about 13993.8075233297. The cubic root of 195826649 is about 580.7072713448.

The spelling of 195826649 in words is "one hundred ninety-five million, eight hundred twenty-six thousand, six hundred forty-nine".