67696009 has 4 divisors (see below), whose sum is σ = 68394004. Its totient is φ = 66998016.

The previous prime is 67696003. The next prime is 67696021. The reversal of 67696009 is 90069676.

It is a happy number.

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 43930384 + 23765625 = 6628^2 + 4875^2 .

It is a cyclic number.

It is not a de Polignac number, because 67696009 - 2³ = 67696001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67696001) 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, 348852 + ... + 349045.

It is an arithmetic number, because the mean of its divisors is an integer number (17098501).

Almost surely, 2^67696009 is an apocalyptic number.

It is an amenable number.

67696009 is a deficient number, since it is larger than the sum of its proper divisors (697995).

67696009 is an equidigital number, since it uses as much as digits as its factorization.

67696009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 697994.

The product of its (nonzero) digits is 122472, while the sum is 43.

The square root of 67696009 is about 8227.7584432213. The cubic root of 67696009 is about 407.5563729456.

The spelling of 67696009 in words is "sixty-seven million, six hundred ninety-six thousand, nine".