997100 has 54 divisors (see below), whose sum is σ = 2382660. Its totient is φ = 361920.

The previous prime is 997099. The next prime is 997103. The reversal of 997100 is 1799.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a nialpdrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 997100.

It is not an unprimeable number, because it can be changed into a prime (997103) by changing a digit.

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 17 ways as a sum of consecutive naturals, for example, 16871 + ... + 16929.

2⁹⁹⁷¹⁰⁰ 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 997100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1191330).

997100 is an abundant number, since it is smaller than the sum of its proper divisors (1385560).

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

997100 is a wasteful number, since it uses less digits than its factorization.

997100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99 (or 79 counting only the distinct ones).

The product of its (nonzero) digits is 567, while the sum is 26.

The square root of 997100 is about 998.5489472229. The cubic root of 997100 is about 99.9032397380.

Adding to 997100 its reverse (1799), we get a palindrome (998899).

The spelling of 997100 in words is "nine hundred ninety-seven thousand, one hundred".