2709643 has 2 divisors, whose sum is σ = 2709644. Its totient is φ = 2709642.

The previous prime is 2709611. The next prime is 2709659. The reversal of 2709643 is 3469072.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2709643 - 2⁵ = 2709611 is a prime.

It is not a weakly prime, because it can be changed into another prime (2739643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1354821 + 1354822.

It is an arithmetic number, because the mean of its divisors is an integer number (1354822).

2^2709643 is an apocalyptic number.

2709643 is a deficient number, since it is larger than the sum of its proper divisors (1).

2709643 is an equidigital number, since it uses as much as digits as its factorization.

2709643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 2709643 is about 1646.0993287162. The cubic root of 2709643 is about 139.4132415324.

The spelling of 2709643 in words is "two million, seven hundred nine thousand, six hundred forty-three".