8122009 has 4 divisors (see below), whose sum is σ = 9282304. Its totient is φ = 6961716.

The previous prime is 8122007. The next prime is 8122021. The reversal of 8122009 is 9002218.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9002218 = 2 ⋅4501109.

It is a cyclic number.

It is not a de Polignac number, because 8122009 - 2¹ = 8122007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8122003) 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, 580137 + ... + 580150.

It is an arithmetic number, because the mean of its divisors is an integer number (2320576).

Almost surely, 2^8122009 is an apocalyptic number.

It is an amenable number.

8122009 is a deficient number, since it is larger than the sum of its proper divisors (1160295).

8122009 is a wasteful number, since it uses less digits than its factorization.

8122009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1160294.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 8122009 is about 2849.9138583473. The cubic root of 8122009 is about 201.0116162028.

The spelling of 8122009 in words is "eight million, one hundred twenty-two thousand, nine".