2479839 has 4 divisors (see below), whose sum is σ = 3306456. Its totient is φ = 1653224.

The previous prime is 2479811. The next prime is 2479847. The reversal of 2479839 is 9389742.

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 2479839 - 2⁸ = 2479583 is a prime.

It is a super-2 number, since 2×2479839² = 12299202931842, which contains 22 as substring.

It is a D-number.

2479839 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 2479839.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2479849) 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, 413304 + ... + 413309.

It is an arithmetic number, because the mean of its divisors is an integer number (826614).

2^2479839 is an apocalyptic number.

2479839 is a deficient number, since it is larger than the sum of its proper divisors (826617).

2479839 is an equidigital number, since it uses as much as digits as its factorization.

2479839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 826616.

The product of its digits is 108864, while the sum is 42.

The square root of 2479839 is about 1574.7504564216. The cubic root of 2479839 is about 135.3550598610.

Subtracting 2479839 from its reverse (9389742), we obtain a triangular number (6909903 = T₃₇₁₇).

The spelling of 2479839 in words is "two million, four hundred seventy-nine thousand, eight hundred thirty-nine".