385709 has 2 divisors, whose sum is σ = 385710. Its totient is φ = 385708.

The previous prime is 385663. The next prime is 385739. The reversal of 385709 is 907583.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 354025 + 31684 = 595^2 + 178^2 .

It is an emirp because it is prime and its reverse (907583) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-385709 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (385739) 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 as a sum of consecutive naturals, namely, 192854 + 192855.

It is an arithmetic number, because the mean of its divisors is an integer number (192855).

2³⁸⁵⁷⁰⁹ is an apocalyptic number.

It is an amenable number.

385709 is a deficient number, since it is larger than the sum of its proper divisors (1).

385709 is an equidigital number, since it uses as much as digits as its factorization.

385709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 385709 is about 621.0547479893. The cubic root of 385709 is about 72.7924925841.

The spelling of 385709 in words is "three hundred eighty-five thousand, seven hundred nine".