196825817 has 2 divisors, whose sum is σ = 196825818. Its totient is φ = 196825816.

The previous prime is 196825793. The next prime is 196825823. The reversal of 196825817 is 718528691.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 179051161 + 17774656 = 13381^2 + 4216^2 .

It is an emirp because it is prime and its reverse (718528691) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 196825817 - 2⁶ = 196825753 is a prime.

It is a super-3 number, since 3×196825817³ (a number of 26 digits) contains 333 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (196825897) 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 as a sum of consecutive naturals, namely, 98412908 + 98412909.

It is an arithmetic number, because the mean of its divisors is an integer number (98412909).

Almost surely, 2^196825817 is an apocalyptic number.

It is an amenable number.

196825817 is a deficient number, since it is larger than the sum of its proper divisors (1).

196825817 is an equidigital number, since it uses as much as digits as its factorization.

196825817 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 241920, while the sum is 47.

The square root of 196825817 is about 14029.4624629741. The cubic root of 196825817 is about 581.6932455660.

The spelling of 196825817 in words is "one hundred ninety-six million, eight hundred twenty-five thousand, eight hundred seventeen".