196995557 has 4 divisors (see below), whose sum is σ = 214904256. Its totient is φ = 179086860.

The previous prime is 196995523. The next prime is 196995563. The reversal of 196995557 is 755599691.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 196995557 - 2¹⁰ = 196994533 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 (196995517) 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 in 3 ways as a sum of consecutive naturals, for example, 8954333 + ... + 8954354.

It is an arithmetic number, because the mean of its divisors is an integer number (53726064).

Almost surely, 2^196995557 is an apocalyptic number.

It is an amenable number.

196995557 is a deficient number, since it is larger than the sum of its proper divisors (17908699).

196995557 is a wasteful number, since it uses less digits than its factorization.

196995557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17908698.

The product of its digits is 3827250, while the sum is 56.

The square root of 196995557 is about 14035.5105714042. The cubic root of 196995557 is about 581.8604123932.

The spelling of 196995557 in words is "one hundred ninety-six million, nine hundred ninety-five thousand, five hundred fifty-seven".