2639743 has 8 divisors (see below), whose sum is σ = 2885760. Its totient is φ = 2403840.

The previous prime is 2639723. The next prime is 2639759. The reversal of 2639743 is 3479362.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2639743 - 2⁵ = 2639711 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2639699 and 2639708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2639723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1978 + ... + 3031.

It is an arithmetic number, because the mean of its divisors is an integer number (360720).

2^2639743 is an apocalyptic number.

2639743 is a deficient number, since it is larger than the sum of its proper divisors (246017).

2639743 is a wasteful number, since it uses less digits than its factorization.

2639743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5057.

The product of its digits is 27216, while the sum is 34.

The square root of 2639743 is about 1624.7285927194. The cubic root of 2639743 is about 138.2039796598.

The spelling of 2639743 in words is "two million, six hundred thirty-nine thousand, seven hundred forty-three".