9876409 has 8 divisors (see below), whose sum is σ = 10480640. Its totient is φ = 9280656.

The previous prime is 9876379. The next prime is 9876413. The reversal of 9876409 is 9046789.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9876409 - 2⁷ = 9876281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9876469) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 367 + ... + 4459.

It is an arithmetic number, because the mean of its divisors is an integer number (1310080).

Almost surely, 2^9876409 is an apocalyptic number.

It is an amenable number.

9876409 is a deficient number, since it is larger than the sum of its proper divisors (604231).

9876409 is a wasteful number, since it uses less digits than its factorization.

9876409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4239.

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 9876409 is about 3142.6754525404. The cubic root of 9876409 is about 214.5522247380.

It can be divided in two parts, 987 and 6409, that added together give a square (7396 = 86²).

The spelling of 9876409 in words is "nine million, eight hundred seventy-six thousand, four hundred nine".