10009399 has 4 divisors (see below), whose sum is σ = 10016136. Its totient is φ = 10002664.

The previous prime is 10009387. The next prime is 10009423. The reversal of 10009399 is 99390001.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 99390001 = 1151 ⋅86351.

It is a cyclic number.

It is not a de Polignac number, because 10009399 - 2⁷ = 10009271 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 10009399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10009319) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49 + ... + 4474.

It is an arithmetic number, because the mean of its divisors is an integer number (2504034).

Almost surely, 2^10009399 is an apocalyptic number.

10009399 is a deficient number, since it is larger than the sum of its proper divisors (6737).

10009399 is an equidigital number, since it uses as much as digits as its factorization.

10009399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6736.

The product of its (nonzero) digits is 2187, while the sum is 31.

The square root of 10009399 is about 3163.7634235195. The cubic root of 10009399 is about 215.5109463058.

The spelling of 10009399 in words is "ten million, nine thousand, three hundred ninety-nine".