2639279 has 4 divisors (see below), whose sum is σ = 2648184. Its totient is φ = 2630376.

The previous prime is 2639251. The next prime is 2639291. The reversal of 2639279 is 9729362.

2639279 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9729362 = 2 ⋅4864681.

It is a de Polignac number, because none of the positive numbers 2^k-2639279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2639239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3992 + ... + 4605.

It is an arithmetic number, because the mean of its divisors is an integer number (662046).

2^2639279 is an apocalyptic number.

2639279 is a deficient number, since it is larger than the sum of its proper divisors (8905).

2639279 is an equidigital number, since it uses as much as digits as its factorization.

2639279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8904.

The product of its digits is 40824, while the sum is 38.

The square root of 2639279 is about 1624.5857933640. The cubic root of 2639279 is about 138.1958815982.

The spelling of 2639279 in words is "two million, six hundred thirty-nine thousand, two hundred seventy-nine".