67696609 has 2 divisors, whose sum is σ = 67696610. Its totient is φ = 67696608.

The previous prime is 67696561. The next prime is 67696633. The reversal of 67696609 is 90669676.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57153600 + 10543009 = 7560^2 + 3247^2 .

It is a cyclic number.

It is not a de Polignac number, because 67696609 - 2²³ = 59308001 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (67696649) 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 as a sum of consecutive naturals, namely, 33848304 + 33848305.

It is an arithmetic number, because the mean of its divisors is an integer number (33848305).

Almost surely, 2^67696609 is an apocalyptic number.

It is an amenable number.

67696609 is a deficient number, since it is larger than the sum of its proper divisors (1).

67696609 is an equidigital number, since it uses as much as digits as its factorization.

67696609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 734832, while the sum is 49.

The square root of 67696609 is about 8227.7949050763. The cubic root of 67696609 is about 407.5575770200.

The spelling of 67696609 in words is "sixty-seven million, six hundred ninety-six thousand, six hundred nine".