997650 has 48 divisors (see below), whose sum is σ = 2752800. Its totient is φ = 265680.

The previous prime is 997649. The next prime is 997651. The reversal of 997650 is 56799.

997650 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (997649) and next prime (997651).

It is a nialpdrome in base 10.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 997650.

It is not an unprimeable number, because it can be changed into a prime (997651) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 981 + ... + 1719.

It is an arithmetic number, because the mean of its divisors is an integer number (57350).

2⁹⁹⁷⁶⁵⁰ is an apocalyptic number.

997650 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 997650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1376400).

997650 is an abundant number, since it is smaller than the sum of its proper divisors (1755150).

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

997650 is a wasteful number, since it uses less digits than its factorization.

997650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 760 (or 749 counting only the distinct ones).

The product of its (nonzero) digits is 17010, while the sum is 36.

The square root of 997650 is about 998.8243088752. The cubic root of 997650 is about 99.9216052253.

The spelling of 997650 in words is "nine hundred ninety-seven thousand, six hundred fifty".