1816001113 has 2 divisors, whose sum is σ = 1816001114.
Its totient is φ = 1816001112.
The previous prime is 1816001101. The next prime is 1816001147. The reversal of 1816001113 is 3111006181.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 1020930304 + 795070809 = 31952^2 + 28197^2
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-1816001113 is a prime.
It is not a weakly prime, because it can be changed into another prime (1816001153) 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, 908000556 + 908000557.
It is an arithmetic number, because the mean of its divisors is an integer number (908000557).
Almost surely, 21816001113 is an apocalyptic number.
It is an amenable number.
1816001113 is a deficient number, since it is larger than the sum of its proper divisors (1).
1816001113 is an equidigital number, since it uses as much as digits as its factorization.
1816001113 is an odious number, because the sum of its binary digits is odd.
The product of its (nonzero) digits is 144, while the sum is 22.
The square root of 1816001113 is about 42614.5645642426.
The cubic root of 1816001113 is about 1220.0342893256.
Adding to 1816001113 its reverse (3111006181), we get a palindrome (4927007294).
The spelling of 1816001113 in words is "one billion, eight hundred sixteen million, one thousand, one hundred thirteen".