2791609 has 4 divisors (see below), whose sum is σ = 2818816. Its totient is φ = 2764404.

The previous prime is 2791597. The next prime is 2791631. The reversal of 2791609 is 9061972.

2791609 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 a cyclic number.

It is not a de Polignac number, because 2791609 - 2⁵ = 2791577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2791639) 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 3 ways as a sum of consecutive naturals, for example, 13449 + ... + 13654.

It is an arithmetic number, because the mean of its divisors is an integer number (704704).

2^2791609 is an apocalyptic number.

It is an amenable number.

2791609 is a deficient number, since it is larger than the sum of its proper divisors (27207).

2791609 is a wasteful number, since it uses less digits than its factorization.

2791609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27206.

The product of its (nonzero) digits is 6804, while the sum is 34.

The square root of 2791609 is about 1670.8108809797. The cubic root of 2791609 is about 140.8050388015.

The spelling of 2791609 in words is "two million, seven hundred ninety-one thousand, six hundred nine".