3788639 has 2 divisors, whose sum is σ = 3788640. Its totient is φ = 3788638.

The previous prime is 3788633. The next prime is 3788663. The reversal of 3788639 is 9368873.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3788639 - 2⁸ = 3788383 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3788639.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3788633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1894319 + 1894320.

It is an arithmetic number, because the mean of its divisors is an integer number (1894320).

Almost surely, 2^3788639 is an apocalyptic number.

3788639 is a deficient number, since it is larger than the sum of its proper divisors (1).

3788639 is an equidigital number, since it uses as much as digits as its factorization.

3788639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 44.

The square root of 3788639 is about 1946.4426526358. The cubic root of 3788639 is about 155.8934046067.

The spelling of 3788639 in words is "three million, seven hundred eighty-eight thousand, six hundred thirty-nine".