2118109639 has 2 divisors, whose sum is σ = 2118109640. Its totient is φ = 2118109638.

The previous prime is 2118109601. The next prime is 2118109657. The reversal of 2118109639 is 9369018112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2118109639 - 2¹¹ = 2118107591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2118109699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1059054819 + 1059054820.

It is an arithmetic number, because the mean of its divisors is an integer number (1059054820).

Almost surely, 2^2118109639 is an apocalyptic number.

2118109639 is a deficient number, since it is larger than the sum of its proper divisors (1).

2118109639 is an equidigital number, since it uses as much as digits as its factorization.

2118109639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 40.

The square root of 2118109639 is about 46022.9251460617. The cubic root of 2118109639 is about 1284.2497175029.

The spelling of 2118109639 in words is "two billion, one hundred eighteen million, one hundred nine thousand, six hundred thirty-nine".