8734009 has 4 divisors (see below), whose sum is σ = 8742016. Its totient is φ = 8726004.

The previous prime is 8734001. The next prime is 8734013. The reversal of 8734009 is 9004378.

It is a happy number.

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 a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9004378 = 2 ⋅4502189.

It is a cyclic number.

It is not a de Polignac number, because 8734009 - 2³ = 8734001 is a prime.

It is a Duffinian number.

8734009 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (8734001) 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, 2049 + ... + 4654.

It is an arithmetic number, because the mean of its divisors is an integer number (2185504).

Almost surely, 2^8734009 is an apocalyptic number.

It is an amenable number.

8734009 is a deficient number, since it is larger than the sum of its proper divisors (8007).

8734009 is a wasteful number, since it uses less digits than its factorization.

8734009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8006.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 8734009 is about 2955.3356831331. The cubic root of 8734009 is about 205.9386580167.

The spelling of 8734009 in words is "eight million, seven hundred thirty-four thousand, nine".