997966772 has 12 divisors (see below), whose sum is σ = 1905209376. Its totient is φ = 453621240.

The previous prime is 997966751. The next prime is 997966813. The reversal of 997966772 is 277669799.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11340488 + ... + 11340575.

It is an arithmetic number, because the mean of its divisors is an integer number (158767448).

Almost surely, 2^997966772 is an apocalyptic number.

It is an amenable number.

997966772 is a deficient number, since it is larger than the sum of its proper divisors (907242604).

997966772 is a wasteful number, since it uses less digits than its factorization.

997966772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22681078 (or 22681076 counting only the distinct ones).

The product of its digits is 18003384, while the sum is 62.

The square root of 997966772 is about 31590.6120865044. The cubic root of 997966772 is about 999.3217974787.

It can be divided in two parts, 997 and 966772, that added together give a palindrome (967769).

The spelling of 997966772 in words is "nine hundred ninety-seven million, nine hundred sixty-six thousand, seven hundred seventy-two".