3879357421 has 2 divisors, whose sum is σ = 3879357422. Its totient is φ = 3879357420.

The previous prime is 3879357409. The next prime is 3879357437. The reversal of 3879357421 is 1247539783.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2634255625 + 1245101796 = 51325^2 + 35286^2 .

It is a cyclic number.

It is not a de Polignac number, because 3879357421 - 2²⁹ = 3342486509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3879357221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1939678710 + 1939678711.

It is an arithmetic number, because the mean of its divisors is an integer number (1939678711).

Almost surely, 2^3879357421 is an apocalyptic number.

It is an amenable number.

3879357421 is a deficient number, since it is larger than the sum of its proper divisors (1).

3879357421 is an equidigital number, since it uses as much as digits as its factorization.

3879357421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1270080, while the sum is 49.

The square root of 3879357421 is about 62284.4878039468. The cubic root of 3879357421 is about 1571.2788505143.

The spelling of 3879357421 in words is "three billion, eight hundred seventy-nine million, three hundred fifty-seven thousand, four hundred twenty-one".