8148409 has 4 divisors (see below), whose sum is σ = 8154916. Its totient is φ = 8141904.

The previous prime is 8148407. The next prime is 8148421. The reversal of 8148409 is 9048418.

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: 9048418 = 2 ⋅4524209.

It can be written as a sum of positive squares in 2 ways, for example, as 4644025 + 3504384 = 2155^2 + 1872^2 .

It is a cyclic number.

It is not a de Polignac number, because 8148409 - 2¹ = 8148407 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8148401) 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, 714 + ... + 4099.

It is an arithmetic number, because the mean of its divisors is an integer number (2038729).

Almost surely, 2^8148409 is an apocalyptic number.

It is an amenable number.

8148409 is a deficient number, since it is larger than the sum of its proper divisors (6507).

8148409 is a wasteful number, since it uses less digits than its factorization.

8148409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6506.

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 8148409 is about 2854.5418196271. The cubic root of 8148409 is about 201.2291718733.

Subtracting 8148409 from its reverse (9048418), we obtain a palindrome (900009).

The spelling of 8148409 in words is "eight million, one hundred forty-eight thousand, four hundred nine".