2118309679 has 2 divisors, whose sum is σ = 2118309680. Its totient is φ = 2118309678.

The previous prime is 2118309673. The next prime is 2118309751. The reversal of 2118309679 is 9769038112.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2118309679 - 2¹³ = 2118301487 is a prime.

It is a super-2 number, since 2×2118309679² = 8974471792290166082, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2118309673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1059154839 + 1059154840.

It is an arithmetic number, because the mean of its divisors is an integer number (1059154840).

Almost surely, 2^2118309679 is an apocalyptic number.

2118309679 is a deficient number, since it is larger than the sum of its proper divisors (1).

2118309679 is an equidigital number, since it uses as much as digits as its factorization.

2118309679 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 163296, while the sum is 46.

The square root of 2118309679 is about 46025.0983594821. The cubic root of 2118309679 is about 1284.2901455685.

The spelling of 2118309679 in words is "two billion, one hundred eighteen million, three hundred nine thousand, six hundred seventy-nine".