2118705487 has 2 divisors, whose sum is σ = 2118705488. Its totient is φ = 2118705486.

The previous prime is 2118705419. The next prime is 2118705521. The reversal of 2118705487 is 7845078112.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2118705487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2118703487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1059352743 + 1059352744.

It is an arithmetic number, because the mean of its divisors is an integer number (1059352744).

Almost surely, 2^2118705487 is an apocalyptic number.

2118705487 is a deficient number, since it is larger than the sum of its proper divisors (1).

2118705487 is an equidigital number, since it uses as much as digits as its factorization.

2118705487 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 125440, while the sum is 43.

The square root of 2118705487 is about 46029.3980734052. The cubic root of 2118705487 is about 1284.3701308293.

The spelling of 2118705487 in words is "two billion, one hundred eighteen million, seven hundred five thousand, four hundred eighty-seven".