194211289 has 6 divisors (see below), whose sum is σ = 201140030. Its totient is φ = 187513536.

The previous prime is 194211233. The next prime is 194211307. The reversal of 194211289 is 982112491.

It can be written as a sum of positive squares in 3 ways, for example, as 92544400 + 101666889 = 9620^2 + 10083^2 .

It is not a de Polignac number, because 194211289 - 2⁹ = 194210777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (194211229) 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 5 ways as a sum of consecutive naturals, for example, 114624 + ... + 116305.

Almost surely, 2^194211289 is an apocalyptic number.

It is an amenable number.

194211289 is a deficient number, since it is larger than the sum of its proper divisors (6928741).

194211289 is an equidigital number, since it uses as much as digits as its factorization.

194211289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230987 (or 230958 counting only the distinct ones).

The product of its digits is 10368, while the sum is 37.

The square root of 194211289 is about 13935.9710461812. The cubic root of 194211289 is about 579.1061230941.

It can be divided in two parts, 1942 and 11289, that added together give a palindrome (13231).

The spelling of 194211289 in words is "one hundred ninety-four million, two hundred eleven thousand, two hundred eighty-nine".