1311737971 has 2 divisors, whose sum is σ = 1311737972. Its totient is φ = 1311737970.

The previous prime is 1311737963. The next prime is 1311737989. The reversal of 1311737971 is 1797371131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1311737971 - 2³ = 1311737963 is a prime.

It is not a weakly prime, because it can be changed into another prime (1311737671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655868985 + 655868986.

It is an arithmetic number, because the mean of its divisors is an integer number (655868986).

Almost surely, 2^1311737971 is an apocalyptic number.

1311737971 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311737971 is an equidigital number, since it uses as much as digits as its factorization.

1311737971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27783, while the sum is 40.

The square root of 1311737971 is about 36217.9233391425. The cubic root of 1311737971 is about 1094.6678505799.

The spelling of 1311737971 in words is "one billion, three hundred eleven million, seven hundred thirty-seven thousand, nine hundred seventy-one".