2790009 has 12 divisors (see below), whose sum is σ = 4128852. Its totient is φ = 1814400.

The previous prime is 2790001. The next prime is 2790019. The reversal of 2790009 is 9000972.

2790009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 356409 + 2433600 = 597^2 + 1560^2 .

It is not a de Polignac number, because 2790009 - 2³ = 2790001 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2790001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3412 + ... + 4149.

It is an arithmetic number, because the mean of its divisors is an integer number (344071).

2^2790009 is an apocalyptic number.

It is an amenable number.

2790009 is a deficient number, since it is larger than the sum of its proper divisors (1338843).

2790009 is a wasteful number, since it uses less digits than its factorization.

2790009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7608 (or 7605 counting only the distinct ones).

The product of its (nonzero) digits is 1134, while the sum is 27.

The square root of 2790009 is about 1670.3320029264. The cubic root of 2790009 is about 140.7781330377.

The spelling of 2790009 in words is "two million, seven hundred ninety thousand, nine".