2479969991 has 4 divisors (see below), whose sum is σ = 2480884800. Its totient is φ = 2479055184.

The previous prime is 2479969969. The next prime is 2479970033. The reversal of 2479969991 is 1999699742.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1999699742 = 2 ⋅999849871.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2479969991 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 (2479969901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 453326 + ... + 458763.

It is an arithmetic number, because the mean of its divisors is an integer number (620221200).

Almost surely, 2^2479969991 is an apocalyptic number.

2479969991 is a deficient number, since it is larger than the sum of its proper divisors (914809).

2479969991 is an equidigital number, since it uses as much as digits as its factorization.

2479969991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 914808.

The product of its digits is 19840464, while the sum is 65.

The square root of 2479969991 is about 49799.2970934330. The cubic root of 2479969991 is about 1353.5744307786.

The spelling of 2479969991 in words is "two billion, four hundred seventy-nine million, nine hundred sixty-nine thousand, nine hundred ninety-one".