3784639 has 2 divisors, whose sum is σ = 3784640. Its totient is φ = 3784638.

The previous prime is 3784633. The next prime is 3784643. The reversal of 3784639 is 9364873.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3784639 - 2³ = 3784631 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3784631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1892319 + 1892320.

It is an arithmetic number, because the mean of its divisors is an integer number (1892320).

Almost surely, 2^3784639 is an apocalyptic number.

3784639 is a deficient number, since it is larger than the sum of its proper divisors (1).

3784639 is an equidigital number, since it uses as much as digits as its factorization.

3784639 is an evil number, because the sum of its binary digits is even.

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

The square root of 3784639 is about 1945.4148657806. The cubic root of 3784639 is about 155.8385218197.

The spelling of 3784639 in words is "three million, seven hundred eighty-four thousand, six hundred thirty-nine".