69705409 has 2 divisors, whose sum is σ = 69705410. Its totient is φ = 69705408.

The previous prime is 69705407. The next prime is 69705431. The reversal of 69705409 is 90450796.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68890000 + 815409 = 8300^2 + 903^2 .

It is a cyclic number.

It is not a de Polignac number, because 69705409 - 2¹ = 69705407 is a prime.

Together with 69705407, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (69705403) 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, 34852704 + 34852705.

It is an arithmetic number, because the mean of its divisors is an integer number (34852705).

Almost surely, 2^69705409 is an apocalyptic number.

It is an amenable number.

69705409 is a deficient number, since it is larger than the sum of its proper divisors (1).

69705409 is an equidigital number, since it uses as much as digits as its factorization.

69705409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 68040, while the sum is 40.

The square root of 69705409 is about 8348.9765241016. The cubic root of 69705409 is about 411.5495772672.

The spelling of 69705409 in words is "sixty-nine million, seven hundred five thousand, four hundred nine".