2639479 has 4 divisors (see below), whose sum is σ = 2642976. Its totient is φ = 2635984.

The previous prime is 2639477. The next prime is 2639489. The reversal of 2639479 is 9749362.

2639479 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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2639479 - 2¹ = 2639477 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2639477) 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, 94 + ... + 2299.

It is an arithmetic number, because the mean of its divisors is an integer number (660744).

2^2639479 is an apocalyptic number.

2639479 is a deficient number, since it is larger than the sum of its proper divisors (3497).

2639479 is a wasteful number, since it uses less digits than its factorization.

2639479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3496.

The product of its digits is 81648, while the sum is 40.

The square root of 2639479 is about 1624.6473463494. The cubic root of 2639479 is about 138.1993722584.

The spelling of 2639479 in words is "two million, six hundred thirty-nine thousand, four hundred seventy-nine".