8133409 has 4 divisors (see below), whose sum is σ = 8167680. Its totient is φ = 8099140.

The previous prime is 8133403. The next prime is 8133413. The reversal of 8133409 is 9043318.

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 cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8133409 is a prime.

It is a super-2 number, since 2×8133409² = 132304683922562, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8133403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16777 + ... + 17254.

It is an arithmetic number, because the mean of its divisors is an integer number (2041920).

Almost surely, 2^8133409 is an apocalyptic number.

It is an amenable number.

8133409 is a deficient number, since it is larger than the sum of its proper divisors (34271).

8133409 is a wasteful number, since it uses less digits than its factorization.

8133409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34270.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 8133409 is about 2851.9132174735. The cubic root of 8133409 is about 201.1056184435.

Subtracting 8133409 from its reverse (9043318), we obtain a palindrome (909909).

The spelling of 8133409 in words is "eight million, one hundred thirty-three thousand, four hundred nine".