3879121 has 2 divisors, whose sum is σ = 3879122. Its totient is φ = 3879120.

The previous prime is 3879119. The next prime is 3879143. The reversal of 3879121 is 1219783.

3879121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3686400 + 192721 = 1920^2 + 439^2 .

It is an emirp because it is prime and its reverse (1219783) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3879121 - 2¹ = 3879119 is a prime.

Together with 3879119, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3879101) 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 as a sum of consecutive naturals, namely, 1939560 + 1939561.

It is an arithmetic number, because the mean of its divisors is an integer number (1939561).

Almost surely, 2^3879121 is an apocalyptic number.

It is an amenable number.

3879121 is a deficient number, since it is larger than the sum of its proper divisors (1).

3879121 is an equidigital number, since it uses as much as digits as its factorization.

3879121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3024, while the sum is 31.

The square root of 3879121 is about 1969.5484254011. The cubic root of 3879121 is about 157.1246930205.

The spelling of 3879121 in words is "three million, eight hundred seventy-nine thousand, one hundred twenty-one".