2638743 has 4 divisors (see below), whose sum is σ = 3518328. Its totient is φ = 1759160.

The previous prime is 2638717. The next prime is 2638747. The reversal of 2638743 is 3478362.

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

It is a cyclic number.

It is not a de Polignac number, because 2638743 - 2⁹ = 2638231 is a prime.

It is a d-powerful number, because it can be written as 2¹⁹ + 6² + 3⁸ + 8⁷ + 7² + 4⁶ + 3⁸ .

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2638747) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 439788 + ... + 439793.

It is an arithmetic number, because the mean of its divisors is an integer number (879582).

2^2638743 is an apocalyptic number.

2638743 is a deficient number, since it is larger than the sum of its proper divisors (879585).

2638743 is an equidigital number, since it uses as much as digits as its factorization.

2638743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 879584.

The product of its digits is 24192, while the sum is 33.

The square root of 2638743 is about 1624.4208198617. The cubic root of 2638743 is about 138.1865257593.

The spelling of 2638743 in words is "two million, six hundred thirty-eight thousand, seven hundred forty-three".