2479789 has 4 divisors (see below), whose sum is σ = 2670556. Its totient is φ = 2289024.

The previous prime is 2479787. The next prime is 2479801. The reversal of 2479789 is 9879742.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1232100 + 1247689 = 1110^2 + 1117^2 .

It is a cyclic number.

It is not a de Polignac number, because 2479789 - 2¹ = 2479787 is a prime.

It is a super-2 number, since 2×2479789² = 12298706969042, which contains 22 as substring.

It is a Duffinian number.

2479789 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2479781) 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 3 ways as a sum of consecutive naturals, for example, 95364 + ... + 95389.

It is an arithmetic number, because the mean of its divisors is an integer number (667639).

2^2479789 is an apocalyptic number.

It is an amenable number.

2479789 is a deficient number, since it is larger than the sum of its proper divisors (190767).

2479789 is a wasteful number, since it uses less digits than its factorization.

2479789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190766.

The product of its digits is 254016, while the sum is 46.

The square root of 2479789 is about 1574.7345808104. The cubic root of 2479789 is about 135.3541501516.

The spelling of 2479789 in words is "two million, four hundred seventy-nine thousand, seven hundred eighty-nine".