650040009 has 4 divisors (see below), whose sum is σ = 866720016. Its totient is φ = 433360004.

The previous prime is 650039933. The next prime is 650040011. The reversal of 650040009 is 900040056.

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 not a de Polignac number, because 650040009 - 2⁷ = 650039881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (650040029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108339999 + ... + 108340004.

It is an arithmetic number, because the mean of its divisors is an integer number (216680004).

Almost surely, 2^650040009 is an apocalyptic number.

It is an amenable number.

650040009 is a deficient number, since it is larger than the sum of its proper divisors (216680007).

650040009 is a wasteful number, since it uses less digits than its factorization.

650040009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216680006.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 650040009 is about 25495.8821969353. The cubic root of 650040009 is about 866.2568779816.

The spelling of 650040009 in words is "six hundred fifty million, forty thousand, nine".