2785439 has 2 divisors, whose sum is σ = 2785440. Its totient is φ = 2785438.

The previous prime is 2785423. The next prime is 2785451. The reversal of 2785439 is 9345872.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2785439 - 2⁴ = 2785423 is a prime.

It is a Sophie Germain 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 (2785469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1392719 + 1392720.

It is an arithmetic number, because the mean of its divisors is an integer number (1392720).

2^2785439 is an apocalyptic number.

2785439 is a deficient number, since it is larger than the sum of its proper divisors (1).

2785439 is an equidigital number, since it uses as much as digits as its factorization.

2785439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 38.

The square root of 2785439 is about 1668.9634507682. The cubic root of 2785439 is about 140.7012267556.

It can be divided in two parts, 2 and 785439, that multiplied together give a triangular number (1570878 = T₁₇₇₂).

The spelling of 2785439 in words is "two million, seven hundred eighty-five thousand, four hundred thirty-nine".