3868564021 has 8 divisors (see below), whose sum is σ = 4430687040. Its totient is φ = 3308808768.

The previous prime is 3868564003. The next prime is 3868564039. The reversal of 3868564021 is 1204658683.

It is an interprime number because it is at equal distance from previous prime (3868564003) and next prime (3868564039).

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 3868564021 - 2²¹ = 3866466869 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 (3868564321) 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 7 ways as a sum of consecutive naturals, for example, 588436 + ... + 594973.

It is an arithmetic number, because the mean of its divisors is an integer number (553835880).

Almost surely, 2^3868564021 is an apocalyptic number.

It is an amenable number.

3868564021 is a deficient number, since it is larger than the sum of its proper divisors (562123019).

3868564021 is a wasteful number, since it uses less digits than its factorization.

3868564021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1183883.

The product of its (nonzero) digits is 276480, while the sum is 43.

The square root of 3868564021 is about 62197.7814797280. The cubic root of 3868564021 is about 1569.8202589477.

The spelling of 3868564021 in words is "three billion, eight hundred sixty-eight million, five hundred sixty-four thousand, twenty-one".