997447 has 4 divisors (see below), whose sum is σ = 1088136. Its totient is φ = 906760.

The previous prime is 997439. The next prime is 997453. The reversal of 997447 is 744799.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 744799 = 11 ⋅67709.

It is a cyclic number.

It is not a de Polignac number, because 997447 - 2³ = 997439 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997427) by changing a digit.

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, 45328 + ... + 45349.

It is an arithmetic number, because the mean of its divisors is an integer number (272034).

2⁹⁹⁷⁴⁴⁷ is an apocalyptic number.

997447 is a deficient number, since it is larger than the sum of its proper divisors (90689).

997447 is a wasteful number, since it uses less digits than its factorization.

997447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90688.

The product of its digits is 63504, while the sum is 40.

The square root of 997447 is about 998.7226842322. The cubic root of 997447 is about 99.9148274770.

It can be divided in two parts, 997 and 447, that added together give a square (1444 = 38²).

The spelling of 997447 in words is "nine hundred ninety-seven thousand, four hundred forty-seven".