3865021013 has 8 divisors (see below), whose sum is σ = 4423854720. Its totient is φ = 3307859280.

The previous prime is 3865021003. The next prime is 3865021019. The reversal of 3865021013 is 3101205683.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3865021013 - 2⁴ = 3865020997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3865021019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 413033 + ... + 422286.

It is an arithmetic number, because the mean of its divisors is an integer number (552981840).

Almost surely, 2^3865021013 is an apocalyptic number.

It is an amenable number.

3865021013 is a deficient number, since it is larger than the sum of its proper divisors (558833707).

3865021013 is an equidigital number, since it uses as much as digits as its factorization.

3865021013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 835987.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 3865021013 is about 62169.2931679298. The cubic root of 3865021013 is about 1569.3408748219.

Adding to 3865021013 its reverse (3101205683), we get a palindrome (6966226696).

The spelling of 3865021013 in words is "three billion, eight hundred sixty-five million, twenty-one thousand, thirteen".