997236 has 18 divisors (see below), whose sum is σ = 2520882. Its totient is φ = 332400.

The previous prime is 997219. The next prime is 997247. The reversal of 997236 is 632799.

It can be written as a sum of positive squares in only one way, i.e., 820836 + 176400 = 906^2 + 420^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 27701 = 997236 / (9 + 9 + 7 + 2 + 3 + 6).

It is a self number, because there is not a number n which added to its sum of digits gives 997236.

It is a congruent number.

It is an unprimeable number.

997236 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13815 + ... + 13886.

It is an arithmetic number, because the mean of its divisors is an integer number (140049).

2⁹⁹⁷²³⁶ is an apocalyptic number.

It is an amenable number.

997236 is an abundant number, since it is smaller than the sum of its proper divisors (1523646).

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

997236 is a wasteful number, since it uses less digits than its factorization.

997236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27711 (or 27706 counting only the distinct ones).

The product of its digits is 20412, while the sum is 36.

The square root of 997236 is about 998.6170437160. The cubic root of 997236 is about 99.9077816506.

The spelling of 997236 in words is "nine hundred ninety-seven thousand, two hundred thirty-six".