997216 has 24 divisors (see below), whose sum is σ = 2142504. Its totient is φ = 453120.

The previous prime is 997207. The next prime is 997219. The reversal of 997216 is 612799.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997219) by changing a digit.

997216 is an untouchable number, because it is not equal to the sum of proper divisors of any 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 in 3 ways as a sum of consecutive naturals, for example, 1065 + ... + 1768.

It is an arithmetic number, because the mean of its divisors is an integer number (89271).

2⁹⁹⁷²¹⁶ is an apocalyptic number.

It is an amenable number.

997216 is an abundant number, since it is smaller than the sum of its proper divisors (1145288).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

997216 is a wasteful number, since it uses less digits than its factorization.

997216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2854 (or 2846 counting only the distinct ones).

The product of its digits is 6804, while the sum is 34.

The square root of 997216 is about 998.6070298170. The cubic root of 997216 is about 99.9071137482.

The spelling of 997216 in words is "nine hundred ninety-seven thousand, two hundred sixteen".