997748 has 6 divisors (see below), whose sum is σ = 1746066. Its totient is φ = 498872.

The previous prime is 997741. The next prime is 997751. The reversal of 997748 is 847799.

It can be written as a sum of positive squares in only one way, i.e., 559504 + 438244 = 748^2 + 662^2 .

It is a junction number, because it is equal to n+sod(n) for n = 997699 and 997708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997741) by changing a digit.

997748 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124715 + ... + 124722.

It is an arithmetic number, because the mean of its divisors is an integer number (291011).

2⁹⁹⁷⁷⁴⁸ is an apocalyptic number.

It is an amenable number.

997748 is a deficient number, since it is larger than the sum of its proper divisors (748318).

997748 is a wasteful number, since it uses less digits than its factorization.

997748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249441 (or 249439 counting only the distinct ones).

The product of its digits is 127008, while the sum is 44.

The square root of 997748 is about 998.8733653472. The cubic root of 997748 is about 99.9248769127.

The spelling of 997748 in words is "nine hundred ninety-seven thousand, seven hundred forty-eight".