9997399 has 4 divisors (see below), whose sum is σ = 10241280. Its totient is φ = 9753520.

The previous prime is 9997397. The next prime is 9997441. The reversal of 9997399 is 9937999.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9937999 = 907 ⋅10957.

It is a cyclic number.

It is not a de Polignac number, because 9997399 - 2¹ = 9997397 is a prime.

It is a Duffinian number.

9997399 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9997397) 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, 121879 + ... + 121960.

It is an arithmetic number, because the mean of its divisors is an integer number (2560320).

Almost surely, 2^9997399 is an apocalyptic number.

9997399 is a deficient number, since it is larger than the sum of its proper divisors (243881).

9997399 is a wasteful number, since it uses less digits than its factorization.

9997399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243880.

The product of its digits is 1240029, while the sum is 55.

The square root of 9997399 is about 3161.8663792134. The cubic root of 9997399 is about 215.4247884347.

The spelling of 9997399 in words is "nine million, nine hundred ninety-seven thousand, three hundred ninety-nine".