997003000 has 96 divisors (see below), whose sum is σ = 2714016240. Its totient is φ = 341812800.

The previous prime is 997002943. The next prime is 997003043. The reversal of 997003000 is 300799.

It is a Cunningham number, because it is equal to 999³+1.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 997003000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38827 + ... + 59173.

Almost surely, 2^997003000 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 997003000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1357008120).

997003000 is an abundant number, since it is smaller than the sum of its proper divisors (1717013240).

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

997003000 is a wasteful number, since it uses less digits than its factorization.

997003000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20382 (or 20361 counting only the distinct ones).

The product of its (nonzero) digits is 1701, while the sum is 28.

The square root of 997003000 is about 31575.3543131348. The cubic root of 997003000 is about 999.0000003340. Note that the first 6 decimals are identical.

Adding to 997003000 its reverse (300799), we get a palindrome (997303799).

The spelling of 997003000 in words is "nine hundred ninety-seven million, three thousand".