3870439 has 2 divisors, whose sum is σ = 3870440. Its totient is φ = 3870438.

The previous prime is 3870437. The next prime is 3870457. The reversal of 3870439 is 9340783.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3870439 - 2¹ = 3870437 is a prime.

Together with 3870437, 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 (3870437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1935219 + 1935220.

It is an arithmetic number, because the mean of its divisors is an integer number (1935220).

Almost surely, 2^3870439 is an apocalyptic number.

3870439 is a deficient number, since it is larger than the sum of its proper divisors (1).

3870439 is an equidigital number, since it uses as much as digits as its factorization.

3870439 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 3870439 is about 1967.3431322471. The cubic root of 3870439 is about 157.0073833195.

The spelling of 3870439 in words is "three million, eight hundred seventy thousand, four hundred thirty-nine".