997180 has 24 divisors (see below), whose sum is σ = 2125872. Its totient is φ = 392832.

The previous prime is 997163. The next prime is 997201. The reversal of 997180 is 81799.

997180 is nontrivially palindromic in base 3.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is an Ulam number.

It is a congruent number.

It is an unprimeable 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 7 ways as a sum of consecutive naturals, for example, 1119 + ... + 1801.

It is an arithmetic number, because the mean of its divisors is an integer number (88578).

2⁹⁹⁷¹⁸⁰ is an apocalyptic number.

It is an amenable number.

997180 is an abundant number, since it is smaller than the sum of its proper divisors (1128692).

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

997180 is a wasteful number, since it uses less digits than its factorization.

997180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 765 (or 763 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 34.

The square root of 997180 is about 998.5890045459. The cubic root of 997180 is about 99.9059115013.

The spelling of 997180 in words is "nine hundred ninety-seven thousand, one hundred eighty".