190665563 has 4 divisors (see below), whose sum is σ = 207998808. Its totient is φ = 173332320.

The previous prime is 190665529. The next prime is 190665577. The reversal of 190665563 is 365566091.

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 190665563 - 2¹⁶ = 190600027 is a prime.

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 190665563.

It is not an unprimeable number, because it can be changed into a prime (190665583) 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, 8666606 + ... + 8666627.

It is an arithmetic number, because the mean of its divisors is an integer number (51999702).

Almost surely, 2^190665563 is an apocalyptic number.

190665563 is a deficient number, since it is larger than the sum of its proper divisors (17333245).

190665563 is a wasteful number, since it uses less digits than its factorization.

190665563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17333244.

The product of its (nonzero) digits is 145800, while the sum is 41.

The square root of 190665563 is about 13808.1701539342. The cubic root of 190665563 is about 575.5601980909.

The spelling of 190665563 in words is "one hundred ninety million, six hundred sixty-five thousand, five hundred sixty-three".