3921481841 has 4 divisors (see below), whose sum is σ = 3958131312. Its totient is φ = 3884832372.

The previous prime is 3921481813. The next prime is 3921481843. The reversal of 3921481841 is 1481841293.

3921481841 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3921481841 - 2³⁰ = 2847740017 is a prime.

It is a super-3 number, since 3×3921481841³ (a number of 30 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3921481843) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18324575 + ... + 18324788.

It is an arithmetic number, because the mean of its divisors is an integer number (989532828).

Almost surely, 2^3921481841 is an apocalyptic number.

It is an amenable number.

3921481841 is a deficient number, since it is larger than the sum of its proper divisors (36649471).

3921481841 is a wasteful number, since it uses less digits than its factorization.

3921481841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36649470.

The product of its digits is 55296, while the sum is 41.

The square root of 3921481841 is about 62621.7361704385. The cubic root of 3921481841 is about 1576.9456885775.

The spelling of 3921481841 in words is "three billion, nine hundred twenty-one million, four hundred eighty-one thousand, eight hundred forty-one".