196455869 has 2 divisors, whose sum is σ = 196455870. Its totient is φ = 196455868.

The previous prime is 196455851. The next prime is 196455871. The reversal of 196455869 is 968554691.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 196140025 + 315844 = 14005^2 + 562^2 .

It is a cyclic number.

It is not a de Polignac number, because 196455869 - 2²⁰ = 195407293 is a prime.

It is a super-2 number, since 2×196455869² = 77189816929090322, which contains 22 as substring.

Together with 196455871, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 196455869.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (196455569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98227934 + 98227935.

It is an arithmetic number, because the mean of its divisors is an integer number (98227935).

Almost surely, 2^196455869 is an apocalyptic number.

It is an amenable number.

196455869 is a deficient number, since it is larger than the sum of its proper divisors (1).

196455869 is an equidigital number, since it uses as much as digits as its factorization.

196455869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2332800, while the sum is 53.

The square root of 196455869 is about 14016.2715798460. The cubic root of 196455869 is about 581.3285725054.

The spelling of 196455869 in words is "one hundred ninety-six million, four hundred fifty-five thousand, eight hundred sixty-nine".