385709539 has 4 divisors (see below), whose sum is σ = 389686024. Its totient is φ = 381733056.

The previous prime is 385709537. The next prime is 385709551. The reversal of 385709539 is 935907583.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 385709539 - 2¹ = 385709537 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 385709492 and 385709501.

It is not an unprimeable number, because it can be changed into a prime (385709531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1988097 + ... + 1988290.

It is an arithmetic number, because the mean of its divisors is an integer number (97421506).

Almost surely, 2^385709539 is an apocalyptic number.

385709539 is a deficient number, since it is larger than the sum of its proper divisors (3976485).

385709539 is an equidigital number, since it uses as much as digits as its factorization.

385709539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3976484.

The product of its (nonzero) digits is 1020600, while the sum is 49.

The square root of 385709539 is about 19639.4892754369. The cubic root of 385709539 is about 727.9252649149.

The spelling of 385709539 in words is "three hundred eighty-five million, seven hundred nine thousand, five hundred thirty-nine".