1311667757 has 2 divisors, whose sum is σ = 1311667758. Its totient is φ = 1311667756.

The previous prime is 1311667733. The next prime is 1311667769. The reversal of 1311667757 is 7577661131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1144198276 + 167469481 = 33826^2 + 12941^2 .

It is an emirp because it is prime and its reverse (7577661131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1311667757 - 2²⁶ = 1244558893 is a prime.

It is a super-2 number, since 2×1311667757² = 3440944609506822098, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1311667157) 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, 655833878 + 655833879.

It is an arithmetic number, because the mean of its divisors is an integer number (655833879).

Almost surely, 2^1311667757 is an apocalyptic number.

It is an amenable number.

1311667757 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311667757 is an equidigital number, since it uses as much as digits as its factorization.

1311667757 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 185220, while the sum is 44.

The square root of 1311667757 is about 36216.9539994738. The cubic root of 1311667757 is about 1094.6483186354.

The spelling of 1311667757 in words is "one billion, three hundred eleven million, six hundred sixty-seven thousand, seven hundred fifty-seven".