8505340979 has 2 divisors, whose sum is σ = 8505340980. Its totient is φ = 8505340978.

The previous prime is 8505340957. The next prime is 8505341029. The reversal of 8505340979 is 9790435058.

It is an a-pointer prime, because the next prime (8505341029) can be obtained adding 8505340979 to its sum of digits (50).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8505340979 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (8505340279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4252670489 + 4252670490.

It is an arithmetic number, because the mean of its divisors is an integer number (4252670490).

Almost surely, 2^8505340979 is an apocalyptic number.

8505340979 is a deficient number, since it is larger than the sum of its proper divisors (1).

8505340979 is an equidigital number, since it uses as much as digits as its factorization.

8505340979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1360800, while the sum is 50.

The square root of 8505340979 is about 92224.4055497242. The cubic root of 8505340979 is about 2041.2549131108.

The spelling of 8505340979 in words is "eight billion, five hundred five million, three hundred forty thousand, nine hundred seventy-nine".