385066813 has 4 divisors (see below), whose sum is σ = 407717820. Its totient is φ = 362415808.

The previous prime is 385066789. The next prime is 385066819. The reversal of 385066813 is 318660583.

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

It can be written as a sum of positive squares in 2 ways, for example, as 190798969 + 194267844 = 13813^2 + 13938^2 .

It is a cyclic number.

It is not a de Polignac number, because 385066813 - 2²¹ = 382969661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (385066819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11325478 + ... + 11325511.

It is an arithmetic number, because the mean of its divisors is an integer number (101929455).

Almost surely, 2^385066813 is an apocalyptic number.

It is an amenable number.

385066813 is a deficient number, since it is larger than the sum of its proper divisors (22651007).

385066813 is a wasteful number, since it uses less digits than its factorization.

385066813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22651006.

The product of its (nonzero) digits is 103680, while the sum is 40.

The square root of 385066813 is about 19623.1193493797. The cubic root of 385066813 is about 727.5207147221.

The spelling of 385066813 in words is "three hundred eighty-five million, sixty-six thousand, eight hundred thirteen".