196185817 has 2 divisors, whose sum is σ = 196185818. Its totient is φ = 196185816.

The previous prime is 196185761. The next prime is 196185839. The reversal of 196185817 is 718581691.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 125978176 + 70207641 = 11224^2 + 8379^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-196185817 is a prime.

It is not a weakly prime, because it can be changed into another prime (196185217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98092908 + 98092909.

It is an arithmetic number, because the mean of its divisors is an integer number (98092909).

Almost surely, 2^196185817 is an apocalyptic number.

It is an amenable number.

196185817 is a deficient number, since it is larger than the sum of its proper divisors (1).

196185817 is an equidigital number, since it uses as much as digits as its factorization.

196185817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 46.

The square root of 196185817 is about 14006.6347492894. The cubic root of 196185817 is about 581.0620818973.

It can be divided in two parts, 1961 and 85817, that added together give a palindrome (87778).

The spelling of 196185817 in words is "one hundred ninety-six million, one hundred eighty-five thousand, eight hundred seventeen".