8518731979 has 2 divisors, whose sum is σ = 8518731980. Its totient is φ = 8518731978.

The previous prime is 8518731967. The next prime is 8518731989. The reversal of 8518731979 is 9791378158.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8518731979 - 2²⁷ = 8384514251 is a prime.

It is not a weakly prime, because it can be changed into another prime (8518731929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4259365989 + 4259365990.

It is an arithmetic number, because the mean of its divisors is an integer number (4259365990).

Almost surely, 2^8518731979 is an apocalyptic number.

8518731979 is a deficient number, since it is larger than the sum of its proper divisors (1).

8518731979 is an equidigital number, since it uses as much as digits as its factorization.

8518731979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3810240, while the sum is 58.

The square root of 8518731979 is about 92296.9770848428. The cubic root of 8518731979 is about 2042.3256172649.

The spelling of 8518731979 in words is "eight billion, five hundred eighteen million, seven hundred thirty-one thousand, nine hundred seventy-nine".