997590 has 32 divisors (see below), whose sum is σ = 2612736. Its totient is φ = 241760.

The previous prime is 997589. The next prime is 997597. The reversal of 997590 is 95799.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 997590.

It is not an unprimeable number, because it can be changed into a prime (997597) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1182 + ... + 1841.

It is an arithmetic number, because the mean of its divisors is an integer number (81648).

2⁹⁹⁷⁵⁹⁰ is an apocalyptic number.

997590 is an abundant number, since it is smaller than the sum of its proper divisors (1615146).

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

997590 is a wasteful number, since it uses less digits than its factorization.

997590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3044.

The product of its (nonzero) digits is 25515, while the sum is 39.

The square root of 997590 is about 998.7942731113. The cubic root of 997590 is about 99.9196020457.

The spelling of 997590 in words is "nine hundred ninety-seven thousand, five hundred ninety".