1118785013 has 2 divisors, whose sum is σ = 1118785014. Its totient is φ = 1118785012.

The previous prime is 1118785001. The next prime is 1118785049. The reversal of 1118785013 is 3105878111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 863360689 + 255424324 = 29383^2 + 15982^2 .

It is a cyclic number.

It is not a de Polignac number, because 1118785013 - 2⁶ = 1118784949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1118785313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 559392506 + 559392507.

It is an arithmetic number, because the mean of its divisors is an integer number (559392507).

Almost surely, 2^1118785013 is an apocalyptic number.

It is an amenable number.

1118785013 is a deficient number, since it is larger than the sum of its proper divisors (1).

1118785013 is an equidigital number, since it uses as much as digits as its factorization.

1118785013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6720, while the sum is 35.

The square root of 1118785013 is about 33448.2437954521. The cubic root of 1118785013 is about 1038.1231599241.

The spelling of 1118785013 in words is "one billion, one hundred eighteen million, seven hundred eighty-five thousand, thirteen".