997072 has 20 divisors (see below), whose sum is σ = 1954116. Its totient is φ = 492800.

The previous prime is 997069. The next prime is 997081. The reversal of 997072 is 270799.

It can be written as a sum of positive squares in 2 ways, for example, as 484416 + 512656 = 696^2 + 716^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1308 + ... + 1924.

2⁹⁹⁷⁰⁷² is an apocalyptic number.

It is an amenable number.

997072 is a deficient number, since it is larger than the sum of its proper divisors (957044).

997072 is a wasteful number, since it uses less digits than its factorization.

997072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 726 (or 720 counting only the distinct ones).

The product of its (nonzero) digits is 7938, while the sum is 34.

The square root of 997072 is about 998.5349267802. The cubic root of 997072 is about 99.9023045871.

The spelling of 997072 in words is "nine hundred ninety-seven thousand, seventy-two".