996721952 has 18 divisors (see below), whose sum is σ = 1962648009. Its totient is φ = 498271680.

The previous prime is 996721939. The next prime is 996721961. The reversal of 996721952 is 259127699.

It is a happy number.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 961248016 + 35473936 = 31004^2 + 5956^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=22324.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 996721952.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 175802 + ... + 181382.

Almost surely, 2^996721952 is an apocalyptic number.

It is an amenable number.

996721952 is a deficient number, since it is larger than the sum of its proper divisors (965926057).

996721952 is an frugal number, since it uses more digits than its factorization.

996721952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11172 (or 5583 counting only the distinct ones).

The product of its digits is 612360, while the sum is 50.

The square root of 996721952 is about 31570.9035664170. The cubic root of 996721952 is about 998.9061211988.

Multiplying 996721952 by its sum of digits (50), we get a square (49836097600 = 223240²).

The spelling of 996721952 in words is "nine hundred ninety-six million, seven hundred twenty-one thousand, nine hundred fifty-two".