69716809 has 2 divisors, whose sum is σ = 69716810. Its totient is φ = 69716808.

The previous prime is 69716807. The next prime is 69716827. The reversal of 69716809 is 90861796.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53290000 + 16426809 = 7300^2 + 4053^2 .

It is a cyclic number.

It is not a de Polignac number, because 69716809 - 2¹ = 69716807 is a prime.

Together with 69716807, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (69716807) 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, 34858404 + 34858405.

It is an arithmetic number, because the mean of its divisors is an integer number (34858405).

Almost surely, 2^69716809 is an apocalyptic number.

It is an amenable number.

69716809 is a deficient number, since it is larger than the sum of its proper divisors (1).

69716809 is an equidigital number, since it uses as much as digits as its factorization.

69716809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 163296, while the sum is 46.

The square root of 69716809 is about 8349.6592146027. The cubic root of 69716809 is about 411.5720117262.

The spelling of 69716809 in words is "sixty-nine million, seven hundred sixteen thousand, eight hundred nine".