2638543 has 2 divisors, whose sum is σ = 2638544. Its totient is φ = 2638542.

The previous prime is 2638529. The next prime is 2638561. The reversal of 2638543 is 3458362.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2638543 - 2¹³ = 2630351 is a prime.

It is a d-powerful number, because it can be written as 2 + 6 + 3⁸ + 8⁷ + 5⁵ + 4⁴ + 3¹² .

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2638243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1319271 + 1319272.

It is an arithmetic number, because the mean of its divisors is an integer number (1319272).

2^2638543 is an apocalyptic number.

2638543 is a deficient number, since it is larger than the sum of its proper divisors (1).

2638543 is an equidigital number, since it uses as much as digits as its factorization.

2638543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17280, while the sum is 31.

The square root of 2638543 is about 1624.3592582923. The cubic root of 2638543 is about 138.1830344501.

The spelling of 2638543 in words is "two million, six hundred thirty-eight thousand, five hundred forty-three".