996727221 has 64 divisors (see below), whose sum is σ = 1844674560. Its totient is φ = 518711040.

The previous prime is 996727219. The next prime is 996727223. The reversal of 996727221 is 122727699.

It is an interprime number because it is at equal distance from previous prime (996727219) and next prime (996727223).

It is not a de Polignac number, because 996727221 - 2¹ = 996727219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (996727223) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 94600 + ... + 104606.

It is an arithmetic number, because the mean of its divisors is an integer number (28823040).

Almost surely, 2^996727221 is an apocalyptic number.

It is an amenable number.

996727221 is a deficient number, since it is larger than the sum of its proper divisors (847947339).

996727221 is a wasteful number, since it uses less digits than its factorization.

996727221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10071 (or 10065 counting only the distinct ones).

The product of its digits is 190512, while the sum is 45.

The square root of 996727221 is about 31570.9870133957. The cubic root of 996727221 is about 998.9078813778.

The spelling of 996727221 in words is "nine hundred ninety-six million, seven hundred twenty-seven thousand, two hundred twenty-one".