997616 has 10 divisors (see below), whose sum is σ = 1932912. Its totient is φ = 498800.

The previous prime is 997609. The next prime is 997627. The reversal of 997616 is 616799.

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 997616.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31160 + ... + 31191.

2⁹⁹⁷⁶¹⁶ is an apocalyptic number.

It is an amenable number.

997616 is a deficient number, since it is larger than the sum of its proper divisors (935296).

997616 is a wasteful number, since it uses less digits than its factorization.

997616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62359 (or 62353 counting only the distinct ones).

The product of its digits is 20412, while the sum is 38.

The square root of 997616 is about 998.8072887199. The cubic root of 997616 is about 99.9204701001.

Subtracting from 997616 its sum of digits (38), we obtain a triangular number (997578 = T₁₄₁₂).

The spelling of 997616 in words is "nine hundred ninety-seven thousand, six hundred sixteen".