1311006173 has 2 divisors, whose sum is σ = 1311006174.
Its totient is φ = 1311006172.
The previous prime is 1311006149. The next prime is 1311006181. The reversal of 1311006173 is 3716001131.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 1258617529 + 52388644 = 35477^2 + 7238^2
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-1311006173 is a prime.
It is a Sophie Germain prime.
It is a Curzon number.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (1311006113) 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, 655503086 + 655503087.
It is an arithmetic number, because the mean of its divisors is an integer number (655503087).
Almost surely, 21311006173 is an apocalyptic number.
It is an amenable number.
1311006173 is a deficient number, since it is larger than the sum of its proper divisors (1).
1311006173 is an equidigital number, since it uses as much as digits as its factorization.
1311006173 is an odious number, because the sum of its binary digits is odd.
The product of its (nonzero) digits is 378, while the sum is 23.
The square root of 1311006173 is about 36207.8192245819.
The cubic root of 1311006173 is about 1094.4642467157.
The spelling of 1311006173 in words is "one billion, three hundred eleven million, six thousand, one hundred seventy-three".