6479879917 has 4 divisors (see below), whose sum is σ = 7405577056. Its totient is φ = 5554182780.

The previous prime is 6479879881. The next prime is 6479879929. The reversal of 6479879917 is 7199789746.

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 6479879917 - 2¹¹ = 6479877869 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 (6479879117) 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, 462848559 + ... + 462848572.

It is an arithmetic number, because the mean of its divisors is an integer number (1851394264).

Almost surely, 2^6479879917 is an apocalyptic number.

It is an amenable number.

6479879917 is a deficient number, since it is larger than the sum of its proper divisors (925697139).

6479879917 is an equidigital number, since it uses as much as digits as its factorization.

6479879917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 925697138.

The product of its digits is 48009024, while the sum is 67.

The square root of 6479879917 is about 80497.7013150065. The cubic root of 6479879917 is about 1864.3279872728.

The spelling of 6479879917 in words is "six billion, four hundred seventy-nine million, eight hundred seventy-nine thousand, nine hundred seventeen".