2785009 has 4 divisors (see below), whose sum is σ = 2874880. Its totient is φ = 2695140.

The previous prime is 2784997. The next prime is 2785019. The reversal of 2785009 is 9005872.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2785009 - 2¹³ = 2776817 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 89839 = 2785009 / (2 + 7 + 8 + 5 + 0 + 0 + 9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2785019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44889 + ... + 44950.

It is an arithmetic number, because the mean of its divisors is an integer number (718720).

2^2785009 is an apocalyptic number.

It is an amenable number.

2785009 is a deficient number, since it is larger than the sum of its proper divisors (89871).

2785009 is an equidigital number, since it uses as much as digits as its factorization.

2785009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89870.

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 2785009 is about 1668.8346233225. The cubic root of 2785009 is about 140.6939861685.

The spelling of 2785009 in words is "two million, seven hundred eighty-five thousand, nine".