1311688447 has 2 divisors, whose sum is σ = 1311688448. Its totient is φ = 1311688446.

The previous prime is 1311688423. The next prime is 1311688471. The reversal of 1311688447 is 7448861131.

It is a balanced prime because it is at equal distance from previous prime (1311688423) and next prime (1311688471).

It is a cyclic number.

It is not a de Polignac number, because 1311688447 - 2¹¹ = 1311686399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1311688487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655844223 + 655844224.

It is an arithmetic number, because the mean of its divisors is an integer number (655844224).

Almost surely, 2^1311688447 is an apocalyptic number.

1311688447 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311688447 is an equidigital number, since it uses as much as digits as its factorization.

1311688447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 129024, while the sum is 43.

The square root of 1311688447 is about 36217.2396380508. The cubic root of 1311688447 is about 1094.6540741972.

The spelling of 1311688447 in words is "one billion, three hundred eleven million, six hundred eighty-eight thousand, four hundred forty-seven".