3789921 has 4 divisors (see below), whose sum is σ = 5053232. Its totient is φ = 2526612.

The previous prime is 3789899. The next prime is 3789931. The reversal of 3789921 is 1299873.

3789921 is digitally balanced in base 2, because in such base 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, and also an emirpimes, since its reverse is a distinct semiprime: 1299873 = 3 ⋅433291.

It is not a de Polignac number, because 3789921 - 2⁵ = 3789889 is a prime.

It is a D-number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3789921.

It is not an unprimeable number, because it can be changed into a prime (3789931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 631651 + ... + 631656.

It is an arithmetic number, because the mean of its divisors is an integer number (1263308).

Almost surely, 2^3789921 is an apocalyptic number.

It is an amenable number.

3789921 is a deficient number, since it is larger than the sum of its proper divisors (1263311).

3789921 is a wasteful number, since it uses less digits than its factorization.

3789921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1263310.

The product of its digits is 27216, while the sum is 39.

The square root of 3789921 is about 1946.7719435003. The cubic root of 3789921 is about 155.9109863651.

The spelling of 3789921 in words is "three million, seven hundred eighty-nine thousand, nine hundred twenty-one".