8971409 has 4 divisors (see below), whose sum is σ = 9050916. Its totient is φ = 8891904.

The previous prime is 8971399. The next prime is 8971421. The reversal of 8971409 is 9041798.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2356225 + 6615184 = 1535^2 + 2572^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8971409 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8971499) 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, 39584 + ... + 39809.

It is an arithmetic number, because the mean of its divisors is an integer number (2262729).

Almost surely, 2^8971409 is an apocalyptic number.

It is an amenable number.

8971409 is a deficient number, since it is larger than the sum of its proper divisors (79507).

8971409 is a wasteful number, since it uses less digits than its factorization.

8971409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79506.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 8971409 is about 2995.2310428413. The cubic root of 8971409 is about 207.7878831790.

The spelling of 8971409 in words is "eight million, nine hundred seventy-one thousand, four hundred nine".