2479681 has 4 divisors (see below), whose sum is σ = 2537392. Its totient is φ = 2421972.

The previous prime is 2479679. The next prime is 2479691. The reversal of 2479681 is 1869742.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2479681 - 2¹ = 2479679 is a prime.

It is a super-4 number, since 4×2479681⁴ (a number of 27 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a zygodrome in base 5.

It is a self number, because there is not a number n which added to its sum of digits gives 2479681.

It is not an unprimeable number, because it can be changed into a prime (2479661) 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, 28791 + ... + 28876.

It is an arithmetic number, because the mean of its divisors is an integer number (634348).

2^2479681 is an apocalyptic number.

It is an amenable number.

2479681 is a deficient number, since it is larger than the sum of its proper divisors (57711).

2479681 is an equidigital number, since it uses as much as digits as its factorization.

2479681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57710.

The product of its digits is 24192, while the sum is 37.

The square root of 2479681 is about 1574.7002889439. The cubic root of 2479681 is about 135.3521851376.

Subtracting from 2479681 its product of digits (24192), we obtain a square (2455489 = 1567²).

It can be divided in two parts, 2479 and 681, that added together give a triangular number (3160 = T₇₉).

The spelling of 2479681 in words is "two million, four hundred seventy-nine thousand, six hundred eighty-one".