196558849 has 4 divisors (see below), whose sum is σ = 196586964. Its totient is φ = 196530736.

The previous prime is 196558847. The next prime is 196558861. The reversal of 196558849 is 948855691.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 57153600 + 139405249 = 7560^2 + 11807^2 .

It is a cyclic number.

It is not a de Polignac number, because 196558849 - 2¹ = 196558847 is a prime.

It is a super-2 number, since 2×196558849² = 77270762240409602, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 196558849.

It is not an unprimeable number, because it can be changed into a prime (196558847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5499 + ... + 20575.

It is an arithmetic number, because the mean of its divisors is an integer number (49146741).

It is a Proth number, since it is equal to 11997 ⋅ 2¹⁴ + 1 and 11997 < 2¹⁴.

Almost surely, 2^196558849 is an apocalyptic number.

It is an amenable number.

196558849 is a deficient number, since it is larger than the sum of its proper divisors (28115).

196558849 is a wasteful number, since it uses less digits than its factorization.

196558849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28114.

The product of its digits is 3110400, while the sum is 55.

The square root of 196558849 is about 14019.9446860535. The cubic root of 196558849 is about 581.4301301046.

The spelling of 196558849 in words is "one hundred ninety-six million, five hundred fifty-eight thousand, eight hundred forty-nine".