9478909 has 4 divisors (see below), whose sum is σ = 10340640. Its totient is φ = 8617180.

The previous prime is 9478897. The next prime is 9478927. The reversal of 9478909 is 9098749.

9478909 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 a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-9478909 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9478949) 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, 430849 + ... + 430870.

It is an arithmetic number, because the mean of its divisors is an integer number (2585160).

Almost surely, 2^9478909 is an apocalyptic number.

It is an amenable number.

9478909 is a deficient number, since it is larger than the sum of its proper divisors (861731).

9478909 is a wasteful number, since it uses less digits than its factorization.

9478909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 861730.

The product of its (nonzero) digits is 163296, while the sum is 46.

The square root of 9478909 is about 3078.7836884068. The cubic root of 9478909 is about 211.6343301777.

It can be divided in two parts, 94 and 78909, that added together give a triangular number (79003 = T₃₉₇).

The spelling of 9478909 in words is "nine million, four hundred seventy-eight thousand, nine hundred nine".