994612221 has 12 divisors (see below), whose sum is σ = 1443957372. Its totient is φ = 659707776.

The previous prime is 994612219. The next prime is 994612249. The reversal of 994612221 is 122216499.

It can be written as a sum of positive squares in 2 ways, for example, as 589032900 + 405579321 = 24270^2 + 20139^2 .

It is not a de Polignac number, because 994612221 - 2¹ = 994612219 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (994612121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 278716 + ... + 282261.

It is an arithmetic number, because the mean of its divisors is an integer number (120329781).

Almost surely, 2^994612221 is an apocalyptic number.

It is an amenable number.

994612221 is a deficient number, since it is larger than the sum of its proper divisors (449345151).

994612221 is a wasteful number, since it uses less digits than its factorization.

994612221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561180 (or 561177 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 994612221 is about 31537.4732817961. The cubic root of 994612221 is about 998.2008386263.

The spelling of 994612221 in words is "nine hundred ninety-four million, six hundred twelve thousand, two hundred twenty-one".