997704 has 64 divisors (see below), whose sum is σ = 2880000. Its totient is φ = 319680.

The previous prime is 997699. The next prime is 997727. The reversal of 997704 is 407799.

997704 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6622 + ... + 6770.

It is an arithmetic number, because the mean of its divisors is an integer number (45000).

2⁹⁹⁷⁷⁰⁴ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 997704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1440000).

997704 is an abundant number, since it is smaller than the sum of its proper divisors (1882296).

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

997704 is a wasteful number, since it uses less digits than its factorization.

997704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195 (or 185 counting only the distinct ones).

The product of its (nonzero) digits is 15876, while the sum is 36.

The square root of 997704 is about 998.8513402904. The cubic root of 997704 is about 99.9234080183.

The spelling of 997704 in words is "nine hundred ninety-seven thousand, seven hundred four".