2655643 has 2 divisors, whose sum is σ = 2655644. Its totient is φ = 2655642.

The previous prime is 2655623. The next prime is 2655661. The reversal of 2655643 is 3465562.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2655643 - 2²¹ = 558491 is a prime.

It is a d-powerful number, because it can be written as 2¹³ + 6 + 5³ + 5⁵ + 6⁴ + 4¹⁰ + 3¹³ .

2655643 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (2655623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1327821 + 1327822.

It is an arithmetic number, because the mean of its divisors is an integer number (1327822).

2^2655643 is an apocalyptic number.

2655643 is a deficient number, since it is larger than the sum of its proper divisors (1).

2655643 is an equidigital number, since it uses as much as digits as its factorization.

2655643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21600, while the sum is 31.

The square root of 2655643 is about 1629.6143715616. The cubic root of 2655643 is about 138.4809063679.

The spelling of 2655643 in words is "two million, six hundred fifty-five thousand, six hundred forty-three".