3876942721 has 8 divisors (see below), whose sum is σ = 4131581184. Its totient is φ = 3629477280.

The previous prime is 3876942709. The next prime is 3876942731. The reversal of 3876942721 is 1272496783.

It is a happy number.

3876942721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 3876942721 - 2²³ = 3868554113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3876942731) 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, 1792140 + ... + 1794301.

It is an arithmetic number, because the mean of its divisors is an integer number (516447648).

Almost surely, 2^3876942721 is an apocalyptic number.

It is an amenable number.

3876942721 is a deficient number, since it is larger than the sum of its proper divisors (254638463).

3876942721 is a wasteful number, since it uses less digits than its factorization.

3876942721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3586511.

The product of its digits is 1016064, while the sum is 49.

The square root of 3876942721 is about 62265.1003452175. The cubic root of 3876942721 is about 1570.9527694889.

The spelling of 3876942721 in words is "three billion, eight hundred seventy-six million, nine hundred forty-two thousand, seven hundred twenty-one".