997773 has 8 divisors (see below), whose sum is σ = 1520448. Its totient is φ = 570144.

The previous prime is 997769. The next prime is 997783. The reversal of 997773 is 377799.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 997773 - 2² = 997769 is a prime.

It is a Curzon number.

It is a nialpdrome in base 10.

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 997773.

It is not an unprimeable number, because it can be changed into a prime (997783) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23736 + ... + 23777.

It is an arithmetic number, because the mean of its divisors is an integer number (190056).

2⁹⁹⁷⁷⁷³ is an apocalyptic number.

It is an amenable number.

997773 is a deficient number, since it is larger than the sum of its proper divisors (522675).

997773 is a wasteful number, since it uses less digits than its factorization.

997773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47523.

The product of its digits is 83349, while the sum is 42.

The square root of 997773 is about 998.8858793676. The cubic root of 997773 is about 99.9257114925.

It can be divided in two parts, 997 and 773, that added together give a triangular number (1770 = T₅₉).

The spelling of 997773 in words is "nine hundred ninety-seven thousand, seven hundred seventy-three".