196805563 has 2 divisors, whose sum is σ = 196805564. Its totient is φ = 196805562.

The previous prime is 196805551. The next prime is 196805573. The reversal of 196805563 is 365508691.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 196805563 - 2²⁵ = 163251131 is a prime.

It is not a weakly prime, because it can be changed into another prime (196805573) 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, 98402781 + 98402782.

It is an arithmetic number, because the mean of its divisors is an integer number (98402782).

Almost surely, 2^196805563 is an apocalyptic number.

196805563 is a deficient number, since it is larger than the sum of its proper divisors (1).

196805563 is an equidigital number, since it uses as much as digits as its factorization.

196805563 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 194400, while the sum is 43.

The square root of 196805563 is about 14028.7406063410. The cubic root of 196805563 is about 581.6732921891.

The spelling of 196805563 in words is "one hundred ninety-six million, eight hundred five thousand, five hundred sixty-three".