6817479971 has 2 divisors, whose sum is σ = 6817479972. Its totient is φ = 6817479970.

The previous prime is 6817479967. The next prime is 6817480009. The reversal of 6817479971 is 1799747186.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6817479971 - 2² = 6817479967 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6817479971.

It is not a weakly prime, because it can be changed into another prime (6817479931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3408739985 + 3408739986.

It is an arithmetic number, because the mean of its divisors is an integer number (3408739986).

Almost surely, 2^6817479971 is an apocalyptic number.

6817479971 is a deficient number, since it is larger than the sum of its proper divisors (1).

6817479971 is an equidigital number, since it uses as much as digits as its factorization.

6817479971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5334336, while the sum is 59.

The square root of 6817479971 is about 82568.0323793658. The cubic root of 6817479971 is about 1896.1584403957.

The spelling of 6817479971 in words is "six billion, eight hundred seventeen million, four hundred seventy-nine thousand, nine hundred seventy-one".