997772 has 12 divisors (see below), whose sum is σ = 1787016. Its totient is φ = 487200.

The previous prime is 997769. The next prime is 997783. The reversal of 997772 is 277799.

It is a happy number.

It is a nialpdrome in base 10.

It is a zygodrome in base 2.

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, 2729 + ... + 3072.

It is an arithmetic number, because the mean of its divisors is an integer number (148918).

2⁹⁹⁷⁷⁷² is an apocalyptic number.

It is an amenable number.

997772 is a deficient number, since it is larger than the sum of its proper divisors (789244).

997772 is a wasteful number, since it uses less digits than its factorization.

997772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5848 (or 5846 counting only the distinct ones).

The product of its digits is 55566, while the sum is 41.

The square root of 997772 is about 998.8853788098. The cubic root of 997772 is about 99.9256781096.

The spelling of 997772 in words is "nine hundred ninety-seven thousand, seven hundred seventy-two".