3874639 has 2 divisors, whose sum is σ = 3874640. Its totient is φ = 3874638.

The previous prime is 3874583. The next prime is 3874669. The reversal of 3874639 is 9364783.

It is a strong prime.

It is an emirp because it is prime and its reverse (9364783) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3874639 - 2¹¹ = 3872591 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3874669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1937319 + 1937320.

It is an arithmetic number, because the mean of its divisors is an integer number (1937320).

Almost surely, 2^3874639 is an apocalyptic number.

3874639 is a deficient number, since it is larger than the sum of its proper divisors (1).

3874639 is an equidigital number, since it uses as much as digits as its factorization.

3874639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 40.

The square root of 3874639 is about 1968.4102722756. The cubic root of 3874639 is about 157.0641548835.

The spelling of 3874639 in words is "three million, eight hundred seventy-four thousand, six hundred thirty-nine".