194284561 has 4 divisors (see below), whose sum is σ = 194312512. Its totient is φ = 194256612.

The previous prime is 194284537. The next prime is 194284577. The reversal of 194284561 is 165482491.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 194284561 - 2⁹ = 194284049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (194284261) 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, 5476 + ... + 20458.

It is an arithmetic number, because the mean of its divisors is an integer number (48578128).

Almost surely, 2^194284561 is an apocalyptic number.

It is an amenable number.

194284561 is a deficient number, since it is larger than the sum of its proper divisors (27951).

194284561 is a wasteful number, since it uses less digits than its factorization.

194284561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27950.

The product of its digits is 69120, while the sum is 40.

The square root of 194284561 is about 13938.5996785904. The cubic root of 194284561 is about 579.1789422882.

The spelling of 194284561 in words is "one hundred ninety-four million, two hundred eighty-four thousand, five hundred sixty-one".