997306 has 4 divisors (see below), whose sum is σ = 1495962. Its totient is φ = 498652.

The previous prime is 997279. The next prime is 997307. The reversal of 997306 is 603799.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 603799 = 7 ⋅86257.

It can be written as a sum of positive squares in only one way, i.e., 648025 + 349281 = 805^2 + 591^2 .

It is not an unprimeable number, because it can be changed into a prime (997307) by changing a digit.

997306 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, 249325 + ... + 249328.

2⁹⁹⁷³⁰⁶ is an apocalyptic number.

997306 is a deficient number, since it is larger than the sum of its proper divisors (498656).

997306 is a wasteful number, since it uses less digits than its factorization.

997306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498655.

The product of its (nonzero) digits is 10206, while the sum is 34.

The square root of 997306 is about 998.6520915714. The cubic root of 997306 is about 99.9101192387.

The spelling of 997306 in words is "nine hundred ninety-seven thousand, three hundred six".