67565009 has 4 divisors (see below), whose sum is σ = 67809204. Its totient is φ = 67320816.

The previous prime is 67564993. The next prime is 67565051. The reversal of 67565009 is 90056576.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5107600 + 62457409 = 2260^2 + 7903^2 .

It is a cyclic number.

It is not a de Polignac number, because 67565009 - 2⁴ = 67564993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67565809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121682 + ... + 122235.

It is an arithmetic number, because the mean of its divisors is an integer number (16952301).

Almost surely, 2^67565009 is an apocalyptic number.

It is an amenable number.

67565009 is a deficient number, since it is larger than the sum of its proper divisors (244195).

67565009 is a wasteful number, since it uses less digits than its factorization.

67565009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244194.

The product of its (nonzero) digits is 56700, while the sum is 38.

The square root of 67565009 is about 8219.7937322052. The cubic root of 67565009 is about 407.2933128265.

The spelling of 67565009 in words is "sixty-seven million, five hundred sixty-five thousand, nine".