8105646979 has 2 divisors, whose sum is σ = 8105646980. Its totient is φ = 8105646978.

The previous prime is 8105646977. The next prime is 8105647049. The reversal of 8105646979 is 9796465018.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8105646979 - 2¹ = 8105646977 is a prime.

Together with 8105646977, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (8105646977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4052823489 + 4052823490.

It is an arithmetic number, because the mean of its divisors is an integer number (4052823490).

Almost surely, 2^8105646979 is an apocalyptic number.

8105646979 is a deficient number, since it is larger than the sum of its proper divisors (1).

8105646979 is an equidigital number, since it uses as much as digits as its factorization.

8105646979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3265920, while the sum is 55.

The square root of 8105646979 is about 90031.3666396329. The cubic root of 8105646979 is about 2008.7654423044.

The spelling of 8105646979 in words is "eight billion, one hundred five million, six hundred forty-six thousand, nine hundred seventy-nine".