9997205 has 4 divisors (see below), whose sum is σ = 11996652. Its totient is φ = 7997760.

The previous prime is 9997201. The next prime is 9997219. The reversal of 9997205 is 5027999.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5027999 = 181 ⋅27779.

It can be written as a sum of positive squares in 2 ways, for example, as 6589489 + 3407716 = 2567^2 + 1846^2 .

It is not a de Polignac number, because 9997205 - 2² = 9997201 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 (9997201) 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, 999716 + ... + 999725.

It is an arithmetic number, because the mean of its divisors is an integer number (2999163).

Almost surely, 2^9997205 is an apocalyptic number.

It is an amenable number.

9997205 is a deficient number, since it is larger than the sum of its proper divisors (1999447).

9997205 is a wasteful number, since it uses less digits than its factorization.

9997205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1999446.

The product of its (nonzero) digits is 51030, while the sum is 41.

The square root of 9997205 is about 3161.8357009813. The cubic root of 9997205 is about 215.4233949830.

The spelling of 9997205 in words is "nine million, nine hundred ninety-seven thousand, two hundred five".