70709 has 2 divisors, whose sum is σ = 70710. Its totient is φ = 70708.

The previous prime is 70687. The next prime is 70717. The reversal of 70709 is 90707.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70225 + 484 = 265^2 + 22^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70709 is a prime.

It is a Chen prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35354 + 35355.

It is an arithmetic number, because the mean of its divisors is an integer number (35355).

2⁷⁰⁷⁰⁹ is an apocalyptic number.

It is an amenable number.

70709 is a deficient number, since it is larger than the sum of its proper divisors (1).

70709 is an equidigital number, since it uses as much as digits as its factorization.

70709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 441, while the sum is 23.

The square root of 70709 is about 265.9116394594. The cubic root of 70709 is about 41.3515282942.

The spelling of 70709 in words is "seventy thousand, seven hundred nine".