1311747671 has 16 divisors (see below), whose sum is σ = 1469411328. Its totient is φ = 1162792800.

The previous prime is 1311747667. The next prime is 1311747677. The reversal of 1311747671 is 1767471131.

It is not a de Polignac number, because 1311747671 - 2² = 1311747667 is a prime.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311747677) 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 in 15 ways as a sum of consecutive naturals, for example, 40370 + ... + 65216.

It is an arithmetic number, because the mean of its divisors is an integer number (91838208).

Almost surely, 2^1311747671 is an apocalyptic number.

1311747671 is a deficient number, since it is larger than the sum of its proper divisors (157663657).

1311747671 is a wasteful number, since it uses less digits than its factorization.

1311747671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25022.

The product of its digits is 24696, while the sum is 38.

The square root of 1311747671 is about 36218.0572504932. The cubic root of 1311747671 is about 1094.6705488454.

The spelling of 1311747671 in words is "one billion, three hundred eleven million, seven hundred forty-seven thousand, six hundred seventy-one".