385243539 has 4 divisors (see below), whose sum is σ = 513658056. Its totient is φ = 256829024.

The previous prime is 385243517. The next prime is 385243553. The reversal of 385243539 is 935342583.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-385243539 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 385243539.

It is not an unprimeable number, because it can be changed into a prime (385243559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64207254 + ... + 64207259.

It is an arithmetic number, because the mean of its divisors is an integer number (128414514).

Almost surely, 2^385243539 is an apocalyptic number.

385243539 is a deficient number, since it is larger than the sum of its proper divisors (128414517).

385243539 is a wasteful number, since it uses less digits than its factorization.

385243539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128414516.

The product of its digits is 388800, while the sum is 42.

The square root of 385243539 is about 19627.6218376043. The cubic root of 385243539 is about 727.6319959831.

The spelling of 385243539 in words is "three hundred eighty-five million, two hundred forty-three thousand, five hundred thirty-nine".