997386 has 32 divisors (see below), whose sum is σ = 2264640. Its totient is φ = 290304.

The previous prime is 997379. The next prime is 997391. The reversal of 997386 is 683799.

It is a happy number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 997386.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1146 + ... + 1818.

It is an arithmetic number, because the mean of its divisors is an integer number (70770).

2⁹⁹⁷³⁸⁶ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 997386, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1132320).

997386 is an abundant number, since it is smaller than the sum of its proper divisors (1267254).

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

997386 is a wasteful number, since it uses less digits than its factorization.

997386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 710.

The product of its digits is 81648, while the sum is 42.

The square root of 997386 is about 998.6921447573. The cubic root of 997386 is about 99.9127906340.

The spelling of 997386 in words is "nine hundred ninety-seven thousand, three hundred eighty-six".