194990559 has 16 divisors (see below), whose sum is σ = 274510080. Its totient is φ = 122774400.

The previous prime is 194990557. The next prime is 194990611. The reversal of 194990559 is 955099491.

It is a happy number.

It is not a de Polignac number, because 194990559 - 2¹ = 194990557 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194990557) 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 15 ways as a sum of consecutive naturals, for example, 14134 + ... + 24284.

It is an arithmetic number, because the mean of its divisors is an integer number (17156880).

Almost surely, 2^194990559 is an apocalyptic number.

194990559 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

194990559 is a deficient number, since it is larger than the sum of its proper divisors (79519521).

194990559 is a wasteful number, since it uses less digits than its factorization.

194990559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10510.

The product of its (nonzero) digits is 656100, while the sum is 51.

The square root of 194990559 is about 13963.9019976509. The cubic root of 194990559 is about 579.8796410975.

The spelling of 194990559 in words is "one hundred ninety-four million, nine hundred ninety thousand, five hundred fifty-nine".