9868409 has 4 divisors (see below), whose sum is σ = 9979380. Its totient is φ = 9757440.

The previous prime is 9868393. The next prime is 9868421. The reversal of 9868409 is 9048689.

9868409 = T₂₄₀ + T₂₄₁ + ... + T₄₁₇.

9868409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9048689 = 13 ⋅696053.

It can be written as a sum of positive squares in 2 ways, for example, as 4012009 + 5856400 = 2003^2 + 2420^2 .

It is a cyclic number.

It is not a de Polignac number, because 9868409 - 2⁴ = 9868393 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 9868409.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9868459) 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, 55352 + ... + 55529.

It is an arithmetic number, because the mean of its divisors is an integer number (2494845).

Almost surely, 2^9868409 is an apocalyptic number.

It is an amenable number.

9868409 is a deficient number, since it is larger than the sum of its proper divisors (110971).

9868409 is a wasteful number, since it uses less digits than its factorization.

9868409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110970.

The product of its (nonzero) digits is 124416, while the sum is 44.

The square root of 9868409 is about 3141.4023938362. The cubic root of 9868409 is about 214.4942792018.

The spelling of 9868409 in words is "nine million, eight hundred sixty-eight thousand, four hundred nine".