196561559 has 4 divisors (see below), whose sum is σ = 199049760. Its totient is φ = 194073360.

The previous prime is 196561549. The next prime is 196561571. The reversal of 196561559 is 955165691.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 196561559 - 2⁸ = 196561303 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (196561549) 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 in 3 ways as a sum of consecutive naturals, for example, 1243982 + ... + 1244139.

It is an arithmetic number, because the mean of its divisors is an integer number (49762440).

Almost surely, 2^196561559 is an apocalyptic number.

196561559 is a deficient number, since it is larger than the sum of its proper divisors (2488201).

196561559 is an equidigital number, since it uses as much as digits as its factorization.

196561559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2488200.

The product of its digits is 364500, while the sum is 47.

The square root of 196561559 is about 14020.0413337479. The cubic root of 196561559 is about 581.4328021939.

The spelling of 196561559 in words is "one hundred ninety-six million, five hundred sixty-one thousand, five hundred fifty-nine".