997570 has 16 divisors (see below), whose sum is σ = 2052288. Its totient is φ = 342000.

The previous prime is 997553. The next prime is 997573. The reversal of 997570 is 75799.

997570 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (997573) by changing a digit.

997570 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7056 + ... + 7195.

It is an arithmetic number, because the mean of its divisors is an integer number (128268).

2⁹⁹⁷⁵⁷⁰ is an apocalyptic number.

997570 is an abundant number, since it is smaller than the sum of its proper divisors (1054718).

It is a weird number, because it is abundant, but not a pseudoperfect number.

997570 is a wasteful number, since it uses less digits than its factorization.

997570 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14265.

The product of its (nonzero) digits is 19845, while the sum is 37.

The square root of 997570 is about 998.7842609893. The cubic root of 997570 is about 99.9189343013.

It can be divided in two parts, 9 and 97570, that added together give a palindrome (97579).

The spelling of 997570 in words is "nine hundred ninety-seven thousand, five hundred seventy".