2709445 has 4 divisors (see below), whose sum is σ = 3251340. Its totient is φ = 2167552.

The previous prime is 2709397. The next prime is 2709467. The reversal of 2709445 is 5449072.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 641601 + 2067844 = 801^2 + 1438^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2709445 is a prime.

2709445 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 270940 + ... + 270949.

It is an arithmetic number, because the mean of its divisors is an integer number (812835).

2^2709445 is an apocalyptic number.

It is an amenable number.

2709445 is a deficient number, since it is larger than the sum of its proper divisors (541895).

2709445 is an equidigital number, since it uses as much as digits as its factorization.

2709445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541894.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 2709445 is about 1646.0391854388. The cubic root of 2709445 is about 139.4098456983.

The spelling of 2709445 in words is "two million, seven hundred nine thousand, four hundred forty-five".