2018727791 has 2 divisors, whose sum is σ = 2018727792. Its totient is φ = 2018727790.

The previous prime is 2018727769. The next prime is 2018727853. The reversal of 2018727791 is 1977278102.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2018727791 is a prime.

It is a super-3 number, since 3×2018727791³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2018726791) 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, 1009363895 + 1009363896.

It is an arithmetic number, because the mean of its divisors is an integer number (1009363896).

Almost surely, 2^2018727791 is an apocalyptic number.

2018727791 is a deficient number, since it is larger than the sum of its proper divisors (1).

2018727791 is an equidigital number, since it uses as much as digits as its factorization.

2018727791 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 98784, while the sum is 44.

The square root of 2018727791 is about 44930.2547399856. The cubic root of 2018727791 is about 1263.8414282513.

The spelling of 2018727791 in words is "two billion, eighteen million, seven hundred twenty-seven thousand, seven hundred ninety-one".