994803221 has 4 divisors (see below), whose sum is σ = 994866444. Its totient is φ = 994740000.

The previous prime is 994803217. The next prime is 994803239. The reversal of 994803221 is 122308499.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 160402225 + 834400996 = 12665^2 + 28886^2 .

It is a cyclic number.

It is not a de Polignac number, because 994803221 - 2² = 994803217 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (994803241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12641 + ... + 46361.

It is an arithmetic number, because the mean of its divisors is an integer number (248716611).

Almost surely, 2^994803221 is an apocalyptic number.

It is an amenable number.

994803221 is a deficient number, since it is larger than the sum of its proper divisors (63223).

994803221 is a wasteful number, since it uses less digits than its factorization.

994803221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63222.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 994803221 is about 31540.5012801002. The cubic root of 994803221 is about 998.2647309163.

The spelling of 994803221 in words is "nine hundred ninety-four million, eight hundred three thousand, two hundred twenty-one".