194225789 has 4 divisors (see below), whose sum is σ = 200923260. Its totient is φ = 187528320.

The previous prime is 194225783. The next prime is 194225803. The reversal of 194225789 is 987522491.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 82500889 + 111724900 = 9083^2 + 10570^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-194225789 is a prime.

It is a super-2 number, since 2×194225789² = 75447314225345042, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194225783) 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, 3348692 + ... + 3348749.

It is an arithmetic number, because the mean of its divisors is an integer number (50230815).

Almost surely, 2^194225789 is an apocalyptic number.

It is an amenable number.

194225789 is a deficient number, since it is larger than the sum of its proper divisors (6697471).

194225789 is an equidigital number, since it uses as much as digits as its factorization.

194225789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6697470.

The product of its digits is 362880, while the sum is 47.

The square root of 194225789 is about 13936.4912729137. The cubic root of 194225789 is about 579.1205349405.

The spelling of 194225789 in words is "one hundred ninety-four million, two hundred twenty-five thousand, seven hundred eighty-nine".